chore: the reduced metrics show up in summary page

docs/api/openapi.yml

@@ -5299,6 +5299,9 @@ components:
           type: string
         id:
           type: string
+        ingestedSamples:
+          minimum: 0
+          type: integer
         ingestedSeries:
           minimum: 0
           type: integer
@@ -5311,9 +5314,9 @@ components:
           $ref: '#/components/schemas/MetricreductionruletypesMatchType'
         metricName:
           type: string
-        reductionPercent:
-          format: double
-          type: number
+        retainedSamples:
+          minimum: 0
+          type: integer
         retainedSeries:
           minimum: 0
           type: integer
@@ -5331,7 +5334,8 @@ components:
       - active
       - ingestedSeries
       - retainedSeries
-      - reductionPercent
+      - ingestedSamples
+      - retainedSamples
       type: object
     MetricreductionruletypesGettableReductionRulePreview:
       properties:
@@ -5374,15 +5378,23 @@ components:
         estimatedMonthlySavingsUsd:
           format: double
           type: number
+        ingestedSamples:
+          minimum: 0
+          type: integer
         ingestedSeries:
           minimum: 0
           type: integer
+        retainedSamples:
+          minimum: 0
+          type: integer
         retainedSeries:
           minimum: 0
           type: integer
       required:
       - ingestedSeries
       - retainedSeries
+      - ingestedSamples
+      - retainedSamples
       - estimatedMonthlySavingsUsd
       type: object
     MetricreductionruletypesGettableReductionRules:
@@ -5448,7 +5460,6 @@ components:
       - metric
       - ingested_volume
       - reduced_volume
-      - reduction
       - last_updated
       type: string
     MetricreductionruletypesUpdatableReductionRule:

ee/modules/metricreductionrule/implmetricreductionrule/clickhouse.go

@@ -289,12 +289,9 @@ func (c *clickhouse) RankByVolume(ctx context.Context, metricNames []string, eff
 	}
 	ctx = c.withThreads(ctx)
 
-	orderExpr := "ingested"
-	switch orderBy {
-	case metricreductionruletypes.OrderByReducedVolume:
-		orderExpr = "reduced"
-	case metricreductionruletypes.OrderByReduction:
-		orderExpr = "if(ingested = 0, 0, (toFloat64(ingested) - toFloat64(reduced)) / toFloat64(ingested))"
+	orderExpr := "ifNull(i.samples, 0)"
+	if orderBy == metricreductionruletypes.OrderByReducedVolume {
+		orderExpr = "if(ifNull(d.samples, 0) = 0 OR ifNull(d.samples, 0) > ifNull(i.samples, 0), ifNull(i.samples, 0), ifNull(d.samples, 0))"
 	}
 	direction := "ASC"
 	if order == metricreductionruletypes.OrderDesc {
@@ -310,17 +307,17 @@ func (c *clickhouse) RankByVolume(ctx context.Context, metricNames []string, eff
 	sb.From("(SELECT arrayJoin(" + sb.Var(metricNames) + ") AS metric_name) AS base")
 	sb.JoinWithOption(
 		sqlbuilder.LeftJoin,
-		"(SELECT metric_name, uniq(fingerprint) AS cnt FROM "+ingestedTable+" WHERE has("+sb.Var(metricNames)+", metric_name) AND unix_milli >= "+sb.Var(startMs)+" AND unix_milli < "+sb.Var(endMs)+" AND "+strictEffectiveFrom(sb, metricNames, effectiveFrom)+" GROUP BY metric_name) AS i",
+		"(SELECT metric_name, uniq(fingerprint) AS cnt, count() AS samples FROM "+ingestedTable+" WHERE has("+sb.Var(metricNames)+", metric_name) AND unix_milli >= "+sb.Var(startMs)+" AND unix_milli < "+sb.Var(endMs)+" AND "+strictEffectiveFrom(sb, metricNames, effectiveFrom)+" GROUP BY metric_name) AS i",
 		"base.metric_name = i.metric_name",
 	)
 	// Reduced series are spread across two type-specific tables; union the per-table distinct
 	// reduced_fingerprints and sum per metric (a metric only lands in the table matching its type).
 	sb.JoinWithOption(
 		sqlbuilder.LeftJoin,
-		"(SELECT metric_name, sum(cnt) AS cnt FROM ("+
-			"SELECT metric_name, uniq(reduced_fingerprint) AS cnt FROM "+reducedLast+" WHERE has("+sb.Var(metricNames)+", metric_name) AND unix_milli >= "+sb.Var(startMs)+" AND unix_milli < "+sb.Var(endMs)+" AND "+strictEffectiveFrom(sb, metricNames, effectiveFrom)+" GROUP BY metric_name"+
+		"(SELECT metric_name, sum(cnt) AS cnt, sum(samples) AS samples FROM ("+
+			"SELECT metric_name, uniq(reduced_fingerprint) AS cnt, uniq(reduced_fingerprint, unix_milli) AS samples FROM "+reducedLast+" WHERE has("+sb.Var(metricNames)+", metric_name) AND unix_milli >= "+sb.Var(startMs)+" AND unix_milli < "+sb.Var(endMs)+" AND "+strictEffectiveFrom(sb, metricNames, effectiveFrom)+" GROUP BY metric_name"+
 			" UNION ALL "+
-			"SELECT metric_name, uniq(reduced_fingerprint) AS cnt FROM "+reducedSum+" WHERE has("+sb.Var(metricNames)+", metric_name) AND unix_milli >= "+sb.Var(startMs)+" AND unix_milli < "+sb.Var(endMs)+" AND "+strictEffectiveFrom(sb, metricNames, effectiveFrom)+" GROUP BY metric_name"+
+			"SELECT metric_name, uniq(reduced_fingerprint) AS cnt, uniq(reduced_fingerprint, unix_milli) AS samples FROM "+reducedSum+" WHERE has("+sb.Var(metricNames)+", metric_name) AND unix_milli >= "+sb.Var(startMs)+" AND unix_milli < "+sb.Var(endMs)+" AND "+strictEffectiveFrom(sb, metricNames, effectiveFrom)+" GROUP BY metric_name"+
 			") GROUP BY metric_name) AS d",
 		"base.metric_name = d.metric_name",
 	)
@@ -347,74 +344,72 @@ func (c *clickhouse) RankByVolume(ctx context.Context, metricNames []string, eff
 	return out, rows.Err()
 }
 
-func (c *clickhouse) SampleVolume(ctx context.Context, metricNames []string, effectiveFrom map[string]int64, startMs, endMs int64) (uint64, uint64, error) {
+func (c *clickhouse) SampleVolumeByMetric(ctx context.Context, metricNames []string, effectiveFrom map[string]int64, startMs, endMs int64) (map[string]volumeRow, error) {
 	if len(metricNames) == 0 {
-		return 0, 0, nil
+		return map[string]volumeRow{}, nil
 	}
 	ctx = c.withThreads(ctx)
 
-	ingested, err := c.countRawSamples(ctx, telemetrymetrics.DBName+"."+telemetrymetrics.SamplesV4BufferTableName, metricNames, effectiveFrom, startMs, endMs)
+	ingested, err := c.countSamplesByMetric(ctx, telemetrymetrics.DBName+"."+telemetrymetrics.SamplesV4BufferTableName, "count()", metricNames, effectiveFrom, startMs, endMs)
 	if err != nil {
-		return 0, 0, err
+		return nil, err
 	}
 
-	last, err := c.countReducedSamples(ctx, telemetrymetrics.DBName+"."+telemetrymetrics.SamplesV4ReducedLastTableName, metricNames, effectiveFrom, startMs, endMs)
+	last, err := c.countSamplesByMetric(ctx, telemetrymetrics.DBName+"."+telemetrymetrics.SamplesV4ReducedLastTableName, "uniq(reduced_fingerprint, unix_milli)", metricNames, effectiveFrom, startMs, endMs)
 	if err != nil {
-		return 0, 0, err
+		return nil, err
 	}
-	sum, err := c.countReducedSamples(ctx, telemetrymetrics.DBName+"."+telemetrymetrics.SamplesV4ReducedSumTableName, metricNames, effectiveFrom, startMs, endMs)
+	sum, err := c.countSamplesByMetric(ctx, telemetrymetrics.DBName+"."+telemetrymetrics.SamplesV4ReducedSumTableName, "uniq(reduced_fingerprint, unix_milli)", metricNames, effectiveFrom, startMs, endMs)
 	if err != nil {
-		return 0, 0, err
+		return nil, err
 	}
 
-	return ingested, min(last+sum, ingested), nil
+	out := make(map[string]volumeRow, len(metricNames))
+	for _, name := range metricNames {
+		out[name] = volumeRow{MetricName: name, Ingested: ingested[name], Reduced: last[name] + sum[name]}
+	}
+	return out, nil
 }
 
-func (c *clickhouse) countRawSamples(ctx context.Context, table string, metricNames []string, effectiveFrom map[string]int64, startMs, endMs int64) (uint64, error) {
+func (c *clickhouse) countSamplesByMetric(ctx context.Context, table, countExpr string, metricNames []string, effectiveFrom map[string]int64, startMs, endMs int64) (map[string]uint64, error) {
 	names := make([]any, len(metricNames))
 	for i, name := range metricNames {
 		names[i] = name
 	}
 
 	sb := sqlbuilder.NewSelectBuilder()
-	sb.Select("count()")
+	sb.Select("metric_name", countExpr)
 	sb.From(table)
-	conds := []string{sb.In("metric_name", names...), sb.GE("unix_milli", startMs), sb.LT("unix_milli", endMs)}
+	conds := []string{
+		sb.In("metric_name", names...),
+		sb.GE("unix_milli", startMs),
+		sb.LT("unix_milli", endMs),
+	}
 	if len(effectiveFrom) > 0 {
 		conds = append(conds, strictEffectiveFrom(sb, metricNames, effectiveFrom))
 	}
 	sb.Where(conds...)
+	sb.GroupBy("metric_name")
 
 	query, args := sb.BuildWithFlavor(sqlbuilder.ClickHouse)
-	var count uint64
-	if err := c.telemetryStore.ClickhouseDB().QueryRow(ctx, query, args...).Scan(&count); err != nil {
-		return 0, errors.WrapInternalf(err, errors.CodeInternal, "failed to count ingested samples")
+	rows, err := c.telemetryStore.ClickhouseDB().Query(ctx, query, args...)
+	if err != nil {
+		return nil, errors.WrapInternalf(err, errors.CodeInternal, "failed to count samples")
 	}
-	return count, nil
-}
+	defer rows.Close()
 
-func (c *clickhouse) countReducedSamples(ctx context.Context, table string, metricNames []string, effectiveFrom map[string]int64, startMs, endMs int64) (uint64, error) {
-	names := make([]any, len(metricNames))
-	for i, name := range metricNames {
-		names[i] = name
+	out := make(map[string]uint64, len(metricNames))
+	for rows.Next() {
+		var (
+			metricName string
+			count      uint64
+		)
+		if err := rows.Scan(&metricName, &count); err != nil {
+			return nil, errors.WrapInternalf(err, errors.CodeInternal, "failed to scan series count")
+		}
+		out[metricName] = count
 	}
-
-	sb := sqlbuilder.NewSelectBuilder()
-	// Reduced tables key the series on reduced_fingerprint (not fingerprint); dedupe ReplacingMergeTree recomputes.
-	sb.Select("uniq(reduced_fingerprint, unix_milli)")
-	sb.From(table)
-	conds := []string{sb.In("metric_name", names...), sb.GE("unix_milli", startMs), sb.LT("unix_milli", endMs)}
-	if len(effectiveFrom) > 0 {
-		conds = append(conds, strictEffectiveFrom(sb, metricNames, effectiveFrom))
-	}
-	sb.Where(conds...)
-
-	query, args := sb.BuildWithFlavor(sqlbuilder.ClickHouse)
-	var count uint64
-	if err := c.telemetryStore.ClickhouseDB().QueryRow(ctx, query, args...).Scan(&count); err != nil {
-		return 0, errors.WrapInternalf(err, errors.CodeInternal, "failed to count reduced samples")
-	}
-	return count, nil
+	return out, rows.Err()
 }
 
 // SeriesTimeseries returns ingested vs reduced series per 60s bucket from the samples tables, gated

ee/modules/metricreductionrule/implmetricreductionrule/module.go

@@ -28,8 +28,13 @@ import (
 
 const (
 	// effectiveFromMargin delays effective_from so the collector picks up the synced rule before it
-	// goes live; it must be >= the collector's rule-refresh interval (see signoz-otel-collector#839).
-	effectiveFromMargin    = 5 * time.Minute
+	// goes live; it must be >= the collector's rule-refresh interval (~2m worst case,
+	// see signoz-otel-collector#839).
+	effectiveFromMargin = 2 * time.Minute
+	// uiActivationDelay keeps a rule shown as "pending" in the UI for a while after it goes live to
+	// the collector, so the user doesn't see "active" before reduced data is actually flowing. The
+	// user-facing pending window is effectiveFromMargin + uiActivationDelay (~5m).
+	uiActivationDelay      = 3 * time.Minute
 	defaultPreviewLookback = 24 * time.Hour
 
 	pricePerMillionSamplesUSD = 0.1
@@ -107,10 +112,14 @@ func (m *module) listSortedByColumn(ctx context.Context, orgID valuer.UUID, para
 	if err != nil {
 		return nil, err
 	}
+	sampleVolumes, err := m.ch.SampleVolumeByMetric(ctx, metricNames, effectiveFrom, startMs, endMs)
+	if err != nil {
+		return nil, err
+	}
 
 	rules := make([]metricreductionruletypes.GettableReductionRule, 0, len(domainRules))
 	for _, rule := range domainRules {
-		rules = append(rules, withVolume(toGettableReductionRule(rule), volumes[rule.MetricName]))
+		rules = append(rules, withVolume(toGettableReductionRule(rule), volumes[rule.MetricName], sampleVolumes[rule.MetricName]))
 	}
 
 	return &metricreductionruletypes.GettableReductionRules{Rules: rules, Total: total}, nil
@@ -139,13 +148,22 @@ func (m *module) listSortedByVolume(ctx context.Context, orgID valuer.UUID, para
 		return nil, err
 	}
 
+	pageMetricNames := make([]string, 0, len(ranked))
+	for _, row := range ranked {
+		pageMetricNames = append(pageMetricNames, row.MetricName)
+	}
+	sampleVolumes, err := m.ch.SampleVolumeByMetric(ctx, pageMetricNames, effectiveFrom, startMs, endMs)
+	if err != nil {
+		return nil, err
+	}
+
 	rules := make([]metricreductionruletypes.GettableReductionRule, 0, len(ranked))
 	for _, row := range ranked {
 		rule, ok := ruleByMetric[row.MetricName]
 		if !ok {
 			continue
 		}
-		rules = append(rules, withVolume(toGettableReductionRule(rule), row))
+		rules = append(rules, withVolume(toGettableReductionRule(rule), row, sampleVolumes[row.MetricName]))
 	}
 
 	return &metricreductionruletypes.GettableReductionRules{Rules: rules, Total: total}, nil
@@ -291,7 +309,7 @@ func (m *module) Stats(ctx context.Context, orgID valuer.UUID) (*metricreduction
 	startMs := now.Add(-defaultPreviewLookback).UnixMilli()
 	endMs := now.UnixMilli()
 
-	allRules, total, err := m.store.List(ctx, orgID, &metricreductionruletypes.ListReductionRulesParams{})
+	rules, total, err := m.store.List(ctx, orgID, &metricreductionruletypes.ListReductionRulesParams{})
 	if err != nil {
 		return nil, err
 	}
@@ -299,9 +317,9 @@ func (m *module) Stats(ctx context.Context, orgID valuer.UUID) (*metricreduction
 		return &metricreductionruletypes.GettableReductionRuleStats{}, nil
 	}
 
-	metricNames := make([]string, len(allRules))
-	effectiveFrom := make(map[string]int64, len(allRules))
-	for i, rule := range allRules {
+	metricNames := make([]string, len(rules))
+	effectiveFrom := make(map[string]int64, len(rules))
+	for i, rule := range rules {
 		metricNames[i] = rule.MetricName
 		effectiveFrom[rule.MetricName] = rule.EffectiveFrom.UnixMilli()
 	}
@@ -311,27 +329,27 @@ func (m *module) Stats(ctx context.Context, orgID valuer.UUID) (*metricreduction
 		return nil, err
 	}
 	var ingestedSeries, retainedSeries uint64
-	reducedMetricNames := make([]string, 0, len(volumes))
-	reducedEffectiveFrom := make(map[string]int64, len(volumes))
-	for name, volume := range volumes {
+	for _, volume := range volumes {
 		ingestedSeries += volume.Ingested
-		retained := effectiveRetained(volume.Ingested, volume.Reduced)
-		retainedSeries += retained
-		if retained < volume.Ingested {
-			reducedMetricNames = append(reducedMetricNames, name)
-			reducedEffectiveFrom[name] = effectiveFrom[name]
-		}
+		retainedSeries += effectiveRetained(volume.Ingested, volume.Reduced)
 	}
 
-	ingestedSamples, reducedSamples, err := m.ch.SampleVolume(ctx, reducedMetricNames, reducedEffectiveFrom, startMs, endMs)
+	sampleVolumes, err := m.ch.SampleVolumeByMetric(ctx, metricNames, effectiveFrom, startMs, endMs)
 	if err != nil {
 		return nil, err
 	}
+	var ingestedSamples, retainedSamples uint64
+	for _, sv := range sampleVolumes {
+		ingestedSamples += sv.Ingested
+		retainedSamples += effectiveRetained(sv.Ingested, sv.Reduced)
+	}
 
 	return &metricreductionruletypes.GettableReductionRuleStats{
 		IngestedSeries:             ingestedSeries,
 		RetainedSeries:             retainedSeries,
-		EstimatedMonthlySavingsUsd: monthlySavingsUSD(ingestedSamples, reducedSamples, startMs, endMs),
+		IngestedSamples:            ingestedSamples,
+		RetainedSamples:            retainedSamples,
+		EstimatedMonthlySavingsUsd: monthlySavingsUSD(ingestedSamples, retainedSamples, startMs, endMs),
 	}, nil
 }
 
@@ -414,7 +432,7 @@ func buildVolumeTimeseries(points []volumePoint) *querybuildertypesv5.QueryRange
 }
 
 func (m *module) validateMetricForReduction(ctx context.Context, orgID valuer.UUID, metricName string) error {
-	lastSeen, err := m.metadataStore.FetchLastSeenInfoMulti(ctx, metricName)
+	lastSeen, err := m.metadataStore.FetchLastSeenInfoMulti(ctx, orgID, metricName)
 	if err != nil {
 		return err
 	}
@@ -482,7 +500,7 @@ func toGettableReductionRule(rule *metricreductionruletypes.ReductionRule) metri
 		MatchType:     rule.MatchType,
 		Labels:        rule.Labels,
 		EffectiveFrom: rule.EffectiveFrom,
-		Active:        !rule.EffectiveFrom.After(time.Now()),
+		Active:        !rule.EffectiveFrom.Add(uiActivationDelay).After(time.Now()),
 	}
 }
 
@@ -493,12 +511,11 @@ func effectiveRetained(ingested, reduced uint64) uint64 {
 	return reduced
 }
 
-func withVolume(rule metricreductionruletypes.GettableReductionRule, volume volumeRow) metricreductionruletypes.GettableReductionRule {
-	rule.IngestedSeries = volume.Ingested
-	rule.RetainedSeries = effectiveRetained(volume.Ingested, volume.Reduced)
-	if volume.Ingested > 0 {
-		rule.ReductionPercent = (1 - float64(rule.RetainedSeries)/float64(volume.Ingested)) * 100
-	}
+func withVolume(rule metricreductionruletypes.GettableReductionRule, series volumeRow, samples volumeRow) metricreductionruletypes.GettableReductionRule {
+	rule.IngestedSeries = series.Ingested
+	rule.RetainedSeries = effectiveRetained(series.Ingested, series.Reduced)
+	rule.IngestedSamples = samples.Ingested
+	rule.RetainedSamples = effectiveRetained(samples.Ingested, samples.Reduced)
 	return rule
 }
 

frontend/src/api/generated/services/sigNoz.schemas.ts

@@ -6853,6 +6853,11 @@ export interface MetricreductionruletypesGettableReductionRuleDTO {
 	 * @type string
 	 */
 	id: string;
+	/**
+	 * @type integer
+	 * @minimum 0
+	 */
+	ingestedSamples: number;
 	/**
 	 * @type integer
 	 * @minimum 0
@@ -6868,10 +6873,10 @@ export interface MetricreductionruletypesGettableReductionRuleDTO {
 	 */
 	metricName: string;
 	/**
-	 * @type number
-	 * @format double
+	 * @type integer
+	 * @minimum 0
 	 */
-	reductionPercent: number;
+	retainedSamples: number;
 	/**
 	 * @type integer
 	 * @minimum 0
@@ -6930,11 +6935,21 @@ export interface MetricreductionruletypesGettableReductionRuleStatsDTO {
 	 * @format double
 	 */
 	estimatedMonthlySavingsUsd: number;
+	/**
+	 * @type integer
+	 * @minimum 0
+	 */
+	ingestedSamples: number;
 	/**
 	 * @type integer
 	 * @minimum 0
 	 */
 	ingestedSeries: number;
+	/**
+	 * @type integer
+	 * @minimum 0
+	 */
+	retainedSamples: number;
 	/**
 	 * @type integer
 	 * @minimum 0
@@ -6990,7 +7005,6 @@ export enum MetricreductionruletypesReductionRuleOrderByDTO {
 	metric = 'metric',
 	ingested_volume = 'ingested_volume',
 	reduced_volume = 'reduced_volume',
-	reduction = 'reduction',
 	last_updated = 'last_updated',
 }
 export interface MetricreductionruletypesUpdatableReductionRuleDTO {

frontend/src/container/MetricsExplorer/VolumeControl/components/VolumeControlBadge.tsx

@@ -1,4 +1,5 @@
 import { Gauge } from '@signozhq/icons';
+import { Tooltip } from 'antd';
 import { MetricreductionruletypesGettableReductionRuleDTO } from 'api/generated/services/sigNoz.schemas';
 
 import { Badge } from '@signozhq/ui/badge';
@@ -8,16 +9,26 @@ interface VolumeControlBadgeProps {
 }
 
 function VolumeControlBadge({ rule }: VolumeControlBadgeProps): JSX.Element {
-	return (
+	const badge = (
 		<Badge
 			data-testid="vc-badge-active"
 			variant="outline"
-			color={!rule.active ? 'success' : 'warning'}
+			color={rule.active ? 'success' : 'warning'}
 		>
 			<Gauge size={12} />
-			{!rule.active ? 'Active' : 'Pending'}
+			{rule.active ? 'Active' : 'Pending'}
 		</Badge>
 	);
+
+	if (rule.active) {
+		return badge;
+	}
+
+	return (
+		<Tooltip title="Takes about 5 minutes to take effect">
+			<span>{badge}</span>
+		</Tooltip>
+	);
 }
 
 export default VolumeControlBadge;

frontend/src/container/MetricsExplorer/VolumeControl/components/VolumeControlChart/VolumeControlChart.module.scss

@@ -15,3 +15,11 @@
 .chartBody {
 	height: 340px;
 }
+
+.chartStatus {
+	display: flex;
+	align-items: center;
+	justify-content: center;
+	width: 100%;
+	height: 100%;
+}

frontend/src/container/MetricsExplorer/VolumeControl/components/VolumeControlChart/VolumeControlChart.tsx

@@ -1,5 +1,6 @@
 import { Color } from '@signozhq/design-tokens';
 import { Typography } from '@signozhq/ui/typography';
+import { Spin } from 'antd';
 import { useGetMetricReductionRuleTimeseries } from 'api/generated/services/metrics';
 import { PANEL_TYPES } from 'constants/queryBuilder';
 import BarChart from 'container/DashboardContainer/visualization/charts/BarChart/BarChart';
@@ -25,7 +26,9 @@ interface VolumeControlChartProps {
 }
 
 function VolumeControlChart({ enabled }: VolumeControlChartProps): JSX.Element {
-	const { data } = useGetMetricReductionRuleTimeseries({ query: { enabled } });
+	const { data, isLoading, isError } = useGetMetricReductionRuleTimeseries({
+		query: { enabled },
+	});
 
 	const isDarkMode = useIsDarkMode();
 	const { timezone } = useTimezone();
@@ -69,7 +72,25 @@ function VolumeControlChart({ enabled }: VolumeControlChartProps): JSX.Element {
 				Series volume over time · ingested vs retained
 			</Typography.Text>
 			<div className={styles.chartBody} ref={graphRef}>
-				{dimensions.width > 0 && (
+				{isLoading && (
+					<div
+						className={styles.chartStatus}
+						data-testid="volume-control-chart-loading"
+					>
+						<Spin size="small" />
+					</div>
+				)}
+				{!isLoading && isError && (
+					<div
+						className={styles.chartStatus}
+						data-testid="volume-control-chart-error"
+					>
+						<Typography.Text size="small" color="danger">
+							Failed to load chart
+						</Typography.Text>
+					</div>
+				)}
+				{!isLoading && !isError && dimensions.width > 0 && (
 					<BarChart
 						config={config}
 						data={chartData}

frontend/src/container/MetricsExplorer/VolumeControl/components/VolumeControlConfigDrawer/ImpactPanel/ImpactPanel.module.scss

@@ -17,11 +17,27 @@
 	gap: 5px;
 }
 
+.meterLabelRow {
+	display: flex;
+	align-items: center;
+	gap: 4px;
+}
+
 .meterLabel {
 	text-transform: uppercase;
 	letter-spacing: 0.04em;
 }
 
+.meterInfo {
+	flex-shrink: 0;
+	color: var(--bg-vanilla-400, #c0c1c3);
+	line-height: 1;
+	cursor: help;
+}
+
 .meterValue {
+	display: flex;
+	align-items: baseline;
+	gap: 6px;
 	font-family: 'Geist Mono', monospace;
 }

frontend/src/container/MetricsExplorer/VolumeControl/components/VolumeControlConfigDrawer/ImpactPanel/ImpactPanel.tsx

@@ -1,6 +1,8 @@
+import { Info } from '@signozhq/icons';
 import { Typography } from '@signozhq/ui/typography';
-import { Spin } from 'antd';
+import { Spin, Tooltip } from 'antd';
 import { MetricreductionruletypesGettableReductionRulePreviewDTO } from 'api/generated/services/sigNoz.schemas';
+import { popupContainer } from 'utils/selectPopupContainer';
 
 import { formatCompact } from '../../../configUtils';
 import { RuleMode } from '../../../types';
@@ -27,6 +29,7 @@ function ImpactPanel({
 		);
 	}
 
+	const full = preview?.ingestedSeries ?? 0;
 	const current = preview?.currentRetainedSeries ?? 0;
 	const proposed = preview?.retainedSeries ?? 0;
 	const deltaPct = current > 0 ? (1 - proposed / current) * 100 : 0;
@@ -40,31 +43,59 @@ function ImpactPanel({
 			{!isLoading && preview && (
 				<div className={styles.meterGrid}>
 					<div className={styles.meter}>
-						<Typography.Text size="xs" color="muted" className={styles.meterLabel}>
-							Current series
+						<div className={styles.meterLabelRow}>
+							<Typography.Text size="xs" color="muted" className={styles.meterLabel}>
+								Full series
+							</Typography.Text>
+							<Tooltip
+								title="Total number of series for this metric before any reduction."
+								getPopupContainer={popupContainer}
+							>
+								<Info size={12} className={styles.meterInfo} />
+							</Tooltip>
+						</div>
+						<Typography.Text size="2xl" className={styles.meterValue}>
+							{formatCompact(full)}
 						</Typography.Text>
+					</div>
+					<div className={styles.meter}>
+						<div className={styles.meterLabelRow}>
+							<Typography.Text size="xs" color="muted" className={styles.meterLabel}>
+								Current retained
+							</Typography.Text>
+							<Tooltip
+								title="Series kept today under the metric's existing rule, or all of them if it has no rule yet."
+								getPopupContainer={popupContainer}
+							>
+								<Info size={12} className={styles.meterInfo} />
+							</Tooltip>
+						</div>
 						<Typography.Text size="2xl" className={styles.meterValue}>
 							{formatCompact(current)}
 						</Typography.Text>
 					</div>
 					<div className={styles.meter}>
-						<Typography.Text size="xs" color="muted" className={styles.meterLabel}>
-							Proposed series
-						</Typography.Text>
+						<div className={styles.meterLabelRow}>
+							<Typography.Text size="xs" color="muted" className={styles.meterLabel}>
+								Potential retained
+							</Typography.Text>
+							<Tooltip
+								title="Series that would be kept if you save this rule, with the reduction vs what's retained today."
+								getPopupContainer={popupContainer}
+							>
+								<Info size={12} className={styles.meterInfo} />
+							</Tooltip>
+						</div>
 						<Typography.Text size="2xl" className={styles.meterValue}>
 							{formatCompact(proposed)}
-						</Typography.Text>
-					</div>
-					<div className={styles.meter}>
-						<Typography.Text size="xs" color="muted" className={styles.meterLabel}>
-							Reduction
-						</Typography.Text>
-						<Typography.Text
-							size="2xl"
-							color={deltaPct >= 0 ? 'success' : undefined}
-							className={styles.meterValue}
-						>
-							{reductionLabel}
+							{deltaPct !== 0 && (
+								<Typography.Text
+									size="small"
+									color={deltaPct >= 0 ? 'success' : undefined}
+								>
+									{reductionLabel}
+								</Typography.Text>
+							)}
 						</Typography.Text>
 					</div>
 				</div>

frontend/src/container/MetricsExplorer/VolumeControl/components/VolumeControlConfigDrawer/ModeSelector/ModeSelector.tsx

@@ -18,12 +18,12 @@ const MODE_OPTIONS: ModeOption[] = [
 	},
 	{
 		mode: 'include',
-		title: 'Include attributes',
+		title: 'Include',
 		description: 'Allowlist: only the selected attributes stay queryable.',
 	},
 	{
 		mode: 'exclude',
-		title: 'Exclude attributes',
+		title: 'Exclude',
 		description: 'Blocklist: the selected attributes are aggregated away.',
 	},
 ];

frontend/src/container/MetricsExplorer/VolumeControl/components/VolumeControlConfigDrawer/VolumeControlConfigDrawer.tsx

@@ -42,6 +42,10 @@ function VolumeControlConfigDrawer({
 
 	const footer = (
 		<div className={styles.footer}>
+			<Typography.Text size="small" color="muted">
+				Changes take effect about 5 minutes after saving.
+			</Typography.Text>
+			<div className={styles.footerSpacer} />
 			<Button
 				variant="outlined"
 				color="secondary"
@@ -50,7 +54,6 @@ function VolumeControlConfigDrawer({
 			>
 				Cancel
 			</Button>
-			<div className={styles.footerSpacer} />
 			{hasExistingRule && (
 				<Button
 					variant="ghost"

frontend/src/container/MetricsExplorer/VolumeControl/components/VolumeControlSection/PendingActivationBanner/PendingActivationBanner.tsx

@@ -8,8 +8,8 @@ function PendingActivationBanner(): JSX.Element {
 		<div className={styles.banner} data-testid="volume-control-pending-banner">
 			<Info size={13} />
 			<Typography.Text size="sm" color="muted">
-				This metric&apos;s configuration was recently updated. Volume changes will
-				take effect within a few minutes.
+				This metric&apos;s configuration was recently updated. Volume changes take
+				effect within about 5 minutes.
 			</Typography.Text>
 		</div>
 	);

frontend/src/container/MetricsExplorer/VolumeControl/components/VolumeControlSection/VolumeControlSection.tsx

@@ -22,7 +22,7 @@ function VolumeControlSection({
 		useVolumeControlFeatureGate();
 	const [isConfigOpen, setIsConfigOpen] = useState(false);
 
-	const { data, isLoading, error } = useListMetricReductionRules(
+	const { data, isLoading, isError } = useListMetricReductionRules(
 		{ metricName },
 		{
 			query: {
@@ -37,7 +37,7 @@ function VolumeControlSection({
 	}
 
 	const rule = data?.data.rules?.[0];
-	const hasRule = !!rule && !error;
+	const hasRule = !!rule && !isError;
 
 	const openConfig = (): void => setIsConfigOpen(true);
 	const closeConfig = (): void => setIsConfigOpen(false);
@@ -53,6 +53,16 @@ function VolumeControlSection({
 
 			{isLoading && <Skeleton active title={false} paragraph={{ rows: 2 }} />}
 
+			{!isLoading && isError && (
+				<Typography.Text
+					size="small"
+					color="danger"
+					data-testid="volume-control-section-error"
+				>
+					Failed to load volume control. Please try again.
+				</Typography.Text>
+			)}
+
 			{!isLoading && hasRule && rule && !rule.active && (
 				<PendingActivationBanner />
 			)}
@@ -65,7 +75,7 @@ function VolumeControlSection({
 				/>
 			)}
 
-			{!isLoading && !hasRule && (
+			{!isLoading && !isError && !hasRule && (
 				<NoRuleEmptyState canManage={canManageVolumeControl} onSetup={openConfig} />
 			)}
 

frontend/src/container/MetricsExplorer/VolumeControl/components/VolumeControlTab/VolumeControlStats/VolumeControlStats.module.scss

@@ -21,11 +21,24 @@
 	background: var(--callout-success-background);
 }
 
+.statCardLabelRow {
+	display: flex;
+	align-items: center;
+	gap: 4px;
+}
+
 .statCardLabel {
 	text-transform: uppercase;
 	letter-spacing: 0.05em;
 }
 
+.statCardInfo {
+	flex-shrink: 0;
+	color: var(--bg-vanilla-400, #c0c1c3);
+	line-height: 1;
+	cursor: help;
+}
+
 .statCardValue {
 	display: flex;
 	align-items: baseline;

frontend/src/container/MetricsExplorer/VolumeControl/components/VolumeControlTab/VolumeControlStats/VolumeControlStats.tsx

@@ -1,4 +1,6 @@
+import { Info } from '@signozhq/icons';
 import { Typography } from '@signozhq/ui/typography';
+import { Skeleton, Tooltip } from 'antd';
 import cx from 'classnames';
 
 import { formatCompact, formatUsd } from '../../../configUtils';
@@ -8,12 +10,17 @@ interface VolumeControlStatsProps {
 	activeRules: number;
 	ingestedSeries: number;
 	retainedSeries: number;
+	ingestedSamples: number;
+	retainedSamples: number;
 	estimatedMonthlySavingsUsd: number;
+	isLoading?: boolean;
+	isError?: boolean;
 }
 
 interface StatItem {
 	label: string;
 	value: string;
+	tooltip: string;
 	delta?: string;
 	unit?: string;
 	highlighted?: boolean;
@@ -24,20 +31,53 @@ function VolumeControlStats({
 	activeRules,
 	ingestedSeries,
 	retainedSeries,
+	ingestedSamples,
+	retainedSamples,
 	estimatedMonthlySavingsUsd,
+	isLoading = false,
+	isError = false,
 }: VolumeControlStatsProps): JSX.Element {
 	const overallReduction =
 		ingestedSeries > 0
 			? Math.round((1 - retainedSeries / ingestedSeries) * 100)
 			: 0;
 
+	const sampleReduction =
+		ingestedSamples > 0
+			? Math.round((1 - retainedSamples / ingestedSamples) * 100)
+			: 0;
+
 	const items: StatItem[] = [
-		{ label: 'Active rules', value: String(activeRules) },
-		{ label: 'Ingested series', value: formatCompact(ingestedSeries) },
+		{
+			label: 'Configured rules',
+			value: String(activeRules),
+			tooltip: 'Volume-control rules currently configured for this workspace.',
+		},
+		{
+			label: 'Ingested series',
+			value: formatCompact(ingestedSeries),
+			tooltip:
+				'Distinct time series observed across active rules in the last 24 hours, from when each rule took effect, before any reduction.',
+		},
 		{
 			label: 'Retained series',
 			value: formatCompact(retainedSeries),
 			delta: overallReduction > 0 ? `−${overallReduction}%` : undefined,
+			tooltip:
+				'Distinct time series retained after reduction across active rules over the same window. Lower means more reduction.',
+		},
+		{
+			label: 'Ingested samples',
+			value: formatCompact(ingestedSamples),
+			tooltip:
+				'Sample data points observed across active rules in the last 24 hours, from when each rule took effect, before any reduction.',
+		},
+		{
+			label: 'Retained samples',
+			value: formatCompact(retainedSamples),
+			delta: sampleReduction > 0 ? `−${sampleReduction}%` : undefined,
+			tooltip:
+				'Sample data points retained after reduction across active rules over the same window. Samples reduction can exceed series reduction since series do not all contribute the same sample volume.',
 		},
 		{
 			label: 'Est. monthly savings',
@@ -45,6 +85,8 @@ function VolumeControlStats({
 			unit: '/mo',
 			highlighted: true,
 			valueGood: true,
+			tooltip:
+				'Estimated from the reduced sample volume assuming 1-month standard retention.',
 		},
 	];
 
@@ -57,28 +99,48 @@ function VolumeControlStats({
 						[styles.statCardHighlighted]: item.highlighted,
 					})}
 				>
-					<Typography.Text size="sm" color="muted" className={styles.statCardLabel}>
-						{item.label}
-					</Typography.Text>
-					<Typography.Text
-						as="div"
-						size="large"
-						weight="semibold"
-						color={item.valueGood ? 'success' : undefined}
-						className={styles.statCardValue}
-					>
-						{item.value}
-						{item.delta && (
-							<Typography.Text size="small" weight="semibold" color="success">
-								{item.delta}
-							</Typography.Text>
-						)}
-						{item.unit && (
-							<Typography.Text size="small" weight="medium" color="muted">
-								{item.unit}
-							</Typography.Text>
-						)}
-					</Typography.Text>
+					<div className={styles.statCardLabelRow}>
+						<Typography.Text size="sm" color="muted" className={styles.statCardLabel}>
+							{item.label}
+						</Typography.Text>
+						<Tooltip title={item.tooltip}>
+							<Info size={12} className={styles.statCardInfo} />
+						</Tooltip>
+					</div>
+					{isLoading && (
+						<Skeleton.Button active size="small" className={styles.statCardValue} />
+					)}
+					{!isLoading && isError && (
+						<Typography.Text
+							as="div"
+							size="small"
+							color="danger"
+							className={styles.statCardValue}
+						>
+							Failed to load
+						</Typography.Text>
+					)}
+					{!isLoading && !isError && (
+						<Typography.Text
+							as="div"
+							size="large"
+							weight="semibold"
+							color={item.valueGood ? 'success' : undefined}
+							className={styles.statCardValue}
+						>
+							{item.value}
+							{item.delta && (
+								<Typography.Text size="small" weight="semibold" color="success">
+									{item.delta}
+								</Typography.Text>
+							)}
+							{item.unit && (
+								<Typography.Text size="small" weight="medium" color="muted">
+									{item.unit}
+								</Typography.Text>
+							)}
+						</Typography.Text>
+					)}
 				</div>
 			))}
 		</div>

frontend/src/container/MetricsExplorer/VolumeControl/components/VolumeControlTab/VolumeControlTab.module.scss

@@ -13,8 +13,10 @@
 	font-family: 'Geist Mono', monospace;
 }
 
-.reductionCell {
-	font-family: 'Geist Mono', monospace;
+.volumeCell {
+	display: flex;
+	flex-direction: column;
+	gap: 2px;
 }
 
 .empty {

frontend/src/container/MetricsExplorer/VolumeControl/components/VolumeControlTab/VolumeControlTab.tsx

@@ -36,7 +36,7 @@ type VolumeControlTableParams = Required<
 >;
 
 const DEFAULT_PARAMS: VolumeControlTableParams = {
-	orderBy: OrderBy.reduction,
+	orderBy: OrderBy.ingested_volume,
 	order: SortOrder.desc,
 	search: '',
 	offset: 0,
@@ -60,11 +60,20 @@ function VolumeControlTab(): JSX.Element {
 		);
 	}, [debouncedSearch]);
 
-	const { data, isLoading } = useListMetricReductionRules(params, {
+	const {
+		data,
+		isLoading,
+		isError: isListError,
+	} = useListMetricReductionRules(params, {
 		query: { enabled: isVolumeControlEnabled },
 	});
 
-	const { data: statsData } = useGetMetricReductionRuleStats({
+	const {
+		data: statsData,
+		isLoading: isStatsLoading,
+		isFetching: isStatsFetching,
+		isError: isStatsError,
+	} = useGetMetricReductionRuleStats({
 		query: { enabled: isVolumeControlEnabled },
 	});
 	const stats = statsData?.data;
@@ -111,7 +120,7 @@ function VolumeControlTab(): JSX.Element {
 				{
 					title: 'MODE',
 					key: 'mode',
-					width: 160,
+					width: 110,
 					render: (
 						_value: unknown,
 						rule: MetricreductionruletypesGettableReductionRuleDTO,
@@ -147,9 +156,17 @@ function VolumeControlTab(): JSX.Element {
 						_value: unknown,
 						rule: MetricreductionruletypesGettableReductionRuleDTO,
 					): JSX.Element => (
-						<Typography.Text size="small" color="muted">
-							{formatCompact(rule.ingestedSeries)}
-						</Typography.Text>
+						<div className={styles.volumeCell}>
+							<Typography.Text size="small">
+								{formatCompact(rule.ingestedSeries)}{' '}
+								<Typography.Text size="small" color="muted">
+									series
+								</Typography.Text>
+							</Typography.Text>
+							<Typography.Text size="small" color="muted">
+								{formatCompact(rule.ingestedSamples)} samples
+							</Typography.Text>
+						</div>
 					),
 				},
 				{
@@ -162,22 +179,35 @@ function VolumeControlTab(): JSX.Element {
 						_value: unknown,
 						rule: MetricreductionruletypesGettableReductionRuleDTO,
 					): JSX.Element => (
-						<Typography.Text size="small">
-							{formatCompact(rule.retainedSeries)}
-						</Typography.Text>
+						<div className={styles.volumeCell}>
+							<Typography.Text size="small">
+								{formatCompact(rule.retainedSeries)}{' '}
+								<Typography.Text size="small" color="muted">
+									series
+								</Typography.Text>
+							</Typography.Text>
+							<Typography.Text size="small" color="muted">
+								{formatCompact(rule.retainedSamples)} samples
+							</Typography.Text>
+						</div>
 					),
 				},
 				{
 					title: 'CHANGE',
-					key: OrderBy.reduction,
-					width: 110,
-					sorter: true,
-					sortOrder: sortOrderFor(OrderBy.reduction),
+					width: 140,
 					render: (
 						_value: unknown,
 						rule: MetricreductionruletypesGettableReductionRuleDTO,
 					): JSX.Element => {
-						if (rule.reductionPercent <= 0) {
+						const seriesReduction =
+							rule.ingestedSeries > 0
+								? (1 - rule.retainedSeries / rule.ingestedSeries) * 100
+								: 0;
+						const samplesReduction =
+							rule.ingestedSamples > 0
+								? (1 - rule.retainedSamples / rule.ingestedSamples) * 100
+								: 0;
+						if (seriesReduction <= 0 && samplesReduction <= 0) {
 							return (
 								<Typography.Text size="small" color="muted">
 									—
@@ -185,14 +215,18 @@ function VolumeControlTab(): JSX.Element {
 							);
 						}
 						return (
-							<Typography.Text
-								size="small"
-								weight="semibold"
-								color="success"
-								className={styles.reductionCell}
-							>
-								−{Math.round(rule.reductionPercent)}%
-							</Typography.Text>
+							<div className={styles.volumeCell}>
+								<Typography.Text size="small" weight="semibold" color="success">
+									{seriesReduction > 0 ? `−${Math.round(seriesReduction)}%` : '0%'}{' '}
+									<Typography.Text size="small" color="muted">
+										series
+									</Typography.Text>
+								</Typography.Text>
+								<Typography.Text size="small" color="muted">
+									{samplesReduction > 0 ? `−${Math.round(samplesReduction)}%` : '0%'}{' '}
+									samples
+								</Typography.Text>
+							</div>
 						);
 					},
 				},
@@ -273,7 +307,11 @@ function VolumeControlTab(): JSX.Element {
 				activeRules={total}
 				ingestedSeries={stats?.ingestedSeries ?? 0}
 				retainedSeries={stats?.retainedSeries ?? 0}
+				ingestedSamples={stats?.ingestedSamples ?? 0}
+				retainedSamples={stats?.retainedSamples ?? 0}
 				estimatedMonthlySavingsUsd={stats?.estimatedMonthlySavingsUsd ?? 0}
+				isLoading={isStatsLoading || isStatsFetching}
+				isError={isStatsError}
 			/>
 
 			<VolumeControlChart enabled={isVolumeControlEnabled} />
@@ -293,7 +331,13 @@ function VolumeControlTab(): JSX.Element {
 					showSizeChanger: false,
 				}}
 				locale={{
-					emptyText: (
+					emptyText: isListError ? (
+						<div className={styles.empty} data-testid="volume-control-tab-error">
+							<Typography.Text color="danger">
+								Failed to load volume control rules. Please try again.
+							</Typography.Text>
+						</div>
+					) : (
 						<div className={styles.empty} data-testid="volume-control-tab-empty">
 							<Typography.Text color="muted">
 								No volume control rules yet. Open a metric and set one up to start

frontend/src/container/MetricsExplorer/VolumeControl/hooks/useVolumeControlConfig.ts

@@ -49,6 +49,7 @@ export interface UseVolumeControlConfigResult {
 const PREVIEW_DEBOUNCE_MS = 400;
 const SAVE_ERROR_MESSAGE = 'Failed to save volume control rule';
 const REMOVE_ERROR_MESSAGE = 'Failed to remove volume control rule';
+const PREVIEW_ERROR_MESSAGE = 'Failed to preview volume control rule';
 
 export function useVolumeControlConfig({
 	metricName,
@@ -95,11 +96,25 @@ export function useVolumeControlConfig({
 		const timer = setTimeout(() => {
 			previewMutate(
 				{ data: { metricName, matchType: matchTypeForMode(mode), labels } },
-				{ onSettled: () => setIsPreviewPending(false) },
+				{
+					onError: (error) =>
+						notifications.error({
+							message: error.response?.data?.error?.message ?? PREVIEW_ERROR_MESSAGE,
+						}),
+					onSettled: () => setIsPreviewPending(false),
+				},
 			);
 		}, PREVIEW_DEBOUNCE_MS);
 		return (): void => clearTimeout(timer);
-	}, [open, mode, labels, metricName, previewMutate, previewReset]);
+	}, [
+		open,
+		mode,
+		labels,
+		metricName,
+		previewMutate,
+		previewReset,
+		notifications,
+	]);
 
 	const createMutation = useCreateMetricReductionRule();
 	const updateMutation = useUpdateMetricReductionRuleByID();
@@ -142,7 +157,10 @@ export function useVolumeControlConfig({
 		}
 
 		const onSuccess = (): void => {
-			notifications.success({ message: 'Volume control rule saved' });
+			notifications.success({
+				message:
+					'Volume control rule saved. It takes about 5 minutes to take effect.',
+			});
 			invalidate();
 			onClose();
 		};

frontend/src/container/MetricsExplorer/VolumeControl/ruleUtils.ts

@@ -9,7 +9,7 @@ export function isKeepMode(
 export function getMatchTypeLabel(
 	matchType: MetricreductionruletypesMatchTypeDTO,
 ): string {
-	return isKeepMode(matchType) ? 'Include attributes' : 'Exclude attributes';
+	return isKeepMode(matchType) ? 'Include' : 'Exclude';
 }
 
 export function getLabelVerb(

pkg/modules/metricsexplorer/implmetricsexplorer/module.go

@@ -1031,17 +1031,76 @@ func (m *module) fetchMetricsStatsWithSamples(
 	samplesSB.GroupBy("metric_name")
 
 	ctes = append(ctes, sqlbuilder.CTEQuery("__sample_counts").As(samplesSB))
+
+	// reduced tables
+	reducedTsSB := sqlbuilder.NewSelectBuilder()
+	reducedTsSB.Select(
+		"metric_name",
+		"uniq(fingerprint) AS timeseries",
+	)
+
+	// the data lands either of the _reduced_last/_reduced_sum tables
+	reducedLastSB := sqlbuilder.NewSelectBuilder()
+	reducedLastSB.Select("metric_name", "uniq(reduced_fingerprint, unix_milli) AS cnt")
+	reducedLastSB.From(fmt.Sprintf("%s.%s", telemetrymetrics.DBName, telemetrymetrics.SamplesV4ReducedLastTableName))
+	reducedLastSB.Where(reducedLastSB.Between("unix_milli", req.Start, req.End))
+	reducedLastSB.Where("NOT startsWith(metric_name, 'signoz')")
+
+	reducedSumSB := sqlbuilder.NewSelectBuilder()
+	reducedSumSB.Select("metric_name", "uniq(reduced_fingerprint, unix_milli) AS cnt")
+	reducedSumSB.From(fmt.Sprintf("%s.%s", telemetrymetrics.DBName, telemetrymetrics.SamplesV4ReducedSumTableName))
+	reducedSumSB.Where(reducedSumSB.Between("unix_milli", req.Start, req.End))
+	reducedSumSB.Where("NOT startsWith(metric_name, 'signoz')")
+
+	if filterWhereClause == nil {
+		reducedTsSB.From(fmt.Sprintf("%s.%s", telemetrymetrics.DBName, telemetrymetrics.TimeseriesV4ReducedTableName))
+		reducedTsSB.Where(reducedTsSB.Between("unix_milli", start, end))
+		reducedTsSB.Where("NOT startsWith(metric_name, 'signoz')")
+		reducedTsSB.Where(reducedTsSB.E("__normalized", normalized))
+		reducedTsSB.GroupBy("metric_name")
+	} else {
+		reducedFpSB := sqlbuilder.NewSelectBuilder()
+		reducedFpSB.Select("metric_name", "fingerprint")
+		reducedFpSB.From(fmt.Sprintf("%s.%s", telemetrymetrics.DBName, telemetrymetrics.TimeseriesV4ReducedTableName))
+		reducedFpSB.Where(reducedFpSB.Between("unix_milli", start, end))
+		reducedFpSB.Where("NOT startsWith(metric_name, 'signoz')")
+		reducedFpSB.Where(reducedFpSB.E("__normalized", normalized))
+		reducedFpSB.AddWhereClause(sqlbuilder.CopyWhereClause(filterWhereClause))
+		reducedFpSB.GroupBy("metric_name", "fingerprint")
+		ctes = append(ctes, sqlbuilder.CTEQuery("__reduced_filtered_fingerprints").As(reducedFpSB))
+
+		reducedTsSB.From("__reduced_filtered_fingerprints")
+		reducedTsSB.GroupBy("metric_name")
+
+		reducedLastSB.Where("reduced_fingerprint IN (SELECT fingerprint FROM __reduced_filtered_fingerprints)")
+		reducedSumSB.Where("reduced_fingerprint IN (SELECT fingerprint FROM __reduced_filtered_fingerprints)")
+	}
+	reducedLastSB.GroupBy("metric_name")
+	reducedSumSB.GroupBy("metric_name")
+
+	reducedSamplesSB := sqlbuilder.NewSelectBuilder()
+	reducedSamplesSB.Select("metric_name", "sum(cnt) AS samples")
+	reducedSamplesSB.From(reducedSamplesSB.BuilderAs(sqlbuilder.UnionAll(reducedLastSB, reducedSumSB), "reduced_samples"))
+	reducedSamplesSB.GroupBy("metric_name")
+
+	ctes = append(ctes,
+		sqlbuilder.CTEQuery("__reduced_time_series_counts").As(reducedTsSB),
+		sqlbuilder.CTEQuery("__reduced_sample_counts").As(reducedSamplesSB),
+	)
+
 	cteBuilder := sqlbuilder.With(ctes...)
 
 	finalSB := cteBuilder.Select(
-		"COALESCE(ts.metric_name, s.metric_name) AS metric_name",
-		"COALESCE(ts.timeseries, 0) AS timeseries",
-		"COALESCE(s.samples, 0) AS samples",
+		"COALESCE(ts.metric_name, rts.metric_name, s.metric_name, rs.metric_name) AS metric_name",
+		"COALESCE(ts.timeseries, 0) + COALESCE(rts.timeseries, 0) AS timeseries",
+		"COALESCE(s.samples, 0) + COALESCE(rs.samples, 0) AS samples",
 		"COUNT(*) OVER() AS total",
 	)
 	finalSB.From("__time_series_counts ts")
-	finalSB.JoinWithOption(sqlbuilder.FullOuterJoin, "__sample_counts s", "ts.metric_name = s.metric_name")
-	finalSB.Where("(COALESCE(ts.timeseries, 0) > 0 OR COALESCE(s.samples, 0) > 0)")
+	finalSB.JoinWithOption(sqlbuilder.FullOuterJoin, "__reduced_time_series_counts rts", "ts.metric_name = rts.metric_name")
+	finalSB.JoinWithOption(sqlbuilder.FullOuterJoin, "__sample_counts s", "COALESCE(ts.metric_name, rts.metric_name) = s.metric_name")
+	finalSB.JoinWithOption(sqlbuilder.FullOuterJoin, "__reduced_sample_counts rs", "COALESCE(ts.metric_name, rts.metric_name, s.metric_name) = rs.metric_name")
+	finalSB.Where("(COALESCE(ts.timeseries, 0) + COALESCE(rts.timeseries, 0) > 0 OR COALESCE(s.samples, 0) + COALESCE(rs.samples, 0) > 0)")
 
 	orderByColumn, orderDirection, err := getStatsOrderByColumn(req.OrderBy)
 	if err != nil {

pkg/modules/metricsexplorer/implmetricsexplorer/module_test.go

@@ -28,9 +28,9 @@ const (
 	// to stable table names that the expected SQL strings can hard-code).
 	testStartMillis                int64 = 1700000000000
 	testEndMillis                  int64 = 1700003600000 // +1h
-	statsNoFilterSQL                     = "WITH __time_series_counts AS (SELECT metric_name, uniq(fingerprint) AS timeseries FROM signoz_metrics.distributed_time_series_v4 WHERE unix_milli BETWEEN ? AND ? AND NOT startsWith(metric_name, 'signoz') AND __normalized = ? GROUP BY metric_name), __sample_counts AS (SELECT metric_name, count(*) AS samples FROM signoz_metrics.distributed_samples_v4 WHERE unix_milli BETWEEN ? AND ? AND NOT startsWith(metric_name, 'signoz') AND metric_name IN (SELECT DISTINCT metric_name FROM signoz_metrics.time_series_v4 WHERE unix_milli BETWEEN ? AND ? AND NOT startsWith(metric_name, 'signoz') AND __normalized = ?) GROUP BY metric_name) SELECT COALESCE(ts.metric_name, s.metric_name) AS metric_name, COALESCE(ts.timeseries, 0) AS timeseries, COALESCE(s.samples, 0) AS samples, COUNT(*) OVER() AS total FROM __time_series_counts ts FULL OUTER JOIN __sample_counts s ON ts.metric_name = s.metric_name WHERE (COALESCE(ts.timeseries, 0) > 0 OR COALESCE(s.samples, 0) > 0) ORDER BY samples DESC, metric_name ASC LIMIT ? OFFSET ?"
-	statsOrderTimeseriesSQL              = "WITH __time_series_counts AS (SELECT metric_name, uniq(fingerprint) AS timeseries FROM signoz_metrics.distributed_time_series_v4 WHERE unix_milli BETWEEN ? AND ? AND NOT startsWith(metric_name, 'signoz') AND __normalized = ? GROUP BY metric_name), __sample_counts AS (SELECT metric_name, count(*) AS samples FROM signoz_metrics.distributed_samples_v4 WHERE unix_milli BETWEEN ? AND ? AND NOT startsWith(metric_name, 'signoz') AND metric_name IN (SELECT DISTINCT metric_name FROM signoz_metrics.time_series_v4 WHERE unix_milli BETWEEN ? AND ? AND NOT startsWith(metric_name, 'signoz') AND __normalized = ?) GROUP BY metric_name) SELECT COALESCE(ts.metric_name, s.metric_name) AS metric_name, COALESCE(ts.timeseries, 0) AS timeseries, COALESCE(s.samples, 0) AS samples, COUNT(*) OVER() AS total FROM __time_series_counts ts FULL OUTER JOIN __sample_counts s ON ts.metric_name = s.metric_name WHERE (COALESCE(ts.timeseries, 0) > 0 OR COALESCE(s.samples, 0) > 0) ORDER BY timeseries ASC, metric_name ASC LIMIT ? OFFSET ?"
-	statsWithFilterSQL                   = "WITH __time_series_counts AS (SELECT metric_name, uniq(fingerprint) AS timeseries FROM signoz_metrics.distributed_time_series_v4 WHERE unix_milli BETWEEN ? AND ? AND NOT startsWith(metric_name, 'signoz') AND __normalized = ? AND JSONExtractString(labels, 'host.name') = ? GROUP BY metric_name), __filtered_fingerprints AS (SELECT fingerprint FROM signoz_metrics.time_series_v4 WHERE unix_milli BETWEEN ? AND ? AND NOT startsWith(metric_name, 'signoz') AND __normalized = ? AND JSONExtractString(labels, 'host.name') = ? GROUP BY fingerprint), __sample_counts AS (SELECT metric_name, count(*) AS samples FROM signoz_metrics.distributed_samples_v4 WHERE unix_milli BETWEEN ? AND ? AND NOT startsWith(metric_name, 'signoz') AND fingerprint IN (SELECT fingerprint FROM __filtered_fingerprints) GROUP BY metric_name) SELECT COALESCE(ts.metric_name, s.metric_name) AS metric_name, COALESCE(ts.timeseries, 0) AS timeseries, COALESCE(s.samples, 0) AS samples, COUNT(*) OVER() AS total FROM __time_series_counts ts FULL OUTER JOIN __sample_counts s ON ts.metric_name = s.metric_name WHERE (COALESCE(ts.timeseries, 0) > 0 OR COALESCE(s.samples, 0) > 0) ORDER BY samples DESC, metric_name ASC LIMIT ? OFFSET ?"
+	statsNoFilterSQL                     = "WITH __time_series_counts AS (SELECT metric_name, uniq(fingerprint) AS timeseries FROM signoz_metrics.distributed_time_series_v4 WHERE unix_milli BETWEEN ? AND ? AND NOT startsWith(metric_name, 'signoz') AND __normalized = ? GROUP BY metric_name), __sample_counts AS (SELECT metric_name, count(*) AS samples FROM signoz_metrics.distributed_samples_v4 WHERE unix_milli BETWEEN ? AND ? AND NOT startsWith(metric_name, 'signoz') AND metric_name IN (SELECT DISTINCT metric_name FROM signoz_metrics.time_series_v4 WHERE unix_milli BETWEEN ? AND ? AND NOT startsWith(metric_name, 'signoz') AND __normalized = ?) GROUP BY metric_name), __reduced_time_series_counts AS (SELECT metric_name, uniq(fingerprint) AS timeseries FROM signoz_metrics.distributed_time_series_v4_reduced WHERE unix_milli BETWEEN ? AND ? AND NOT startsWith(metric_name, 'signoz') AND __normalized = ? GROUP BY metric_name), __reduced_sample_counts AS (SELECT metric_name, sum(cnt) AS samples FROM ((SELECT metric_name, uniq(reduced_fingerprint, unix_milli) AS cnt FROM signoz_metrics.distributed_samples_v4_reduced_last_60s WHERE unix_milli BETWEEN ? AND ? AND NOT startsWith(metric_name, 'signoz') GROUP BY metric_name) UNION ALL (SELECT metric_name, uniq(reduced_fingerprint, unix_milli) AS cnt FROM signoz_metrics.distributed_samples_v4_reduced_sum_60s WHERE unix_milli BETWEEN ? AND ? AND NOT startsWith(metric_name, 'signoz') GROUP BY metric_name)) AS reduced_samples GROUP BY metric_name) SELECT COALESCE(ts.metric_name, rts.metric_name, s.metric_name, rs.metric_name) AS metric_name, COALESCE(ts.timeseries, 0) + COALESCE(rts.timeseries, 0) AS timeseries, COALESCE(s.samples, 0) + COALESCE(rs.samples, 0) AS samples, COUNT(*) OVER() AS total FROM __time_series_counts ts FULL OUTER JOIN __reduced_time_series_counts rts ON ts.metric_name = rts.metric_name FULL OUTER JOIN __sample_counts s ON COALESCE(ts.metric_name, rts.metric_name) = s.metric_name FULL OUTER JOIN __reduced_sample_counts rs ON COALESCE(ts.metric_name, rts.metric_name, s.metric_name) = rs.metric_name WHERE (COALESCE(ts.timeseries, 0) + COALESCE(rts.timeseries, 0) > 0 OR COALESCE(s.samples, 0) + COALESCE(rs.samples, 0) > 0) ORDER BY samples DESC, metric_name ASC LIMIT ? OFFSET ?"
+	statsOrderTimeseriesSQL              = "WITH __time_series_counts AS (SELECT metric_name, uniq(fingerprint) AS timeseries FROM signoz_metrics.distributed_time_series_v4 WHERE unix_milli BETWEEN ? AND ? AND NOT startsWith(metric_name, 'signoz') AND __normalized = ? GROUP BY metric_name), __sample_counts AS (SELECT metric_name, count(*) AS samples FROM signoz_metrics.distributed_samples_v4 WHERE unix_milli BETWEEN ? AND ? AND NOT startsWith(metric_name, 'signoz') AND metric_name IN (SELECT DISTINCT metric_name FROM signoz_metrics.time_series_v4 WHERE unix_milli BETWEEN ? AND ? AND NOT startsWith(metric_name, 'signoz') AND __normalized = ?) GROUP BY metric_name), __reduced_time_series_counts AS (SELECT metric_name, uniq(fingerprint) AS timeseries FROM signoz_metrics.distributed_time_series_v4_reduced WHERE unix_milli BETWEEN ? AND ? AND NOT startsWith(metric_name, 'signoz') AND __normalized = ? GROUP BY metric_name), __reduced_sample_counts AS (SELECT metric_name, sum(cnt) AS samples FROM ((SELECT metric_name, uniq(reduced_fingerprint, unix_milli) AS cnt FROM signoz_metrics.distributed_samples_v4_reduced_last_60s WHERE unix_milli BETWEEN ? AND ? AND NOT startsWith(metric_name, 'signoz') GROUP BY metric_name) UNION ALL (SELECT metric_name, uniq(reduced_fingerprint, unix_milli) AS cnt FROM signoz_metrics.distributed_samples_v4_reduced_sum_60s WHERE unix_milli BETWEEN ? AND ? AND NOT startsWith(metric_name, 'signoz') GROUP BY metric_name)) AS reduced_samples GROUP BY metric_name) SELECT COALESCE(ts.metric_name, rts.metric_name, s.metric_name, rs.metric_name) AS metric_name, COALESCE(ts.timeseries, 0) + COALESCE(rts.timeseries, 0) AS timeseries, COALESCE(s.samples, 0) + COALESCE(rs.samples, 0) AS samples, COUNT(*) OVER() AS total FROM __time_series_counts ts FULL OUTER JOIN __reduced_time_series_counts rts ON ts.metric_name = rts.metric_name FULL OUTER JOIN __sample_counts s ON COALESCE(ts.metric_name, rts.metric_name) = s.metric_name FULL OUTER JOIN __reduced_sample_counts rs ON COALESCE(ts.metric_name, rts.metric_name, s.metric_name) = rs.metric_name WHERE (COALESCE(ts.timeseries, 0) + COALESCE(rts.timeseries, 0) > 0 OR COALESCE(s.samples, 0) + COALESCE(rs.samples, 0) > 0) ORDER BY timeseries ASC, metric_name ASC LIMIT ? OFFSET ?"
+	statsWithFilterSQL                   = "WITH __time_series_counts AS (SELECT metric_name, uniq(fingerprint) AS timeseries FROM signoz_metrics.distributed_time_series_v4 WHERE unix_milli BETWEEN ? AND ? AND NOT startsWith(metric_name, 'signoz') AND __normalized = ? AND JSONExtractString(labels, 'host.name') = ? GROUP BY metric_name), __filtered_fingerprints AS (SELECT fingerprint FROM signoz_metrics.time_series_v4 WHERE unix_milli BETWEEN ? AND ? AND NOT startsWith(metric_name, 'signoz') AND __normalized = ? AND JSONExtractString(labels, 'host.name') = ? GROUP BY fingerprint), __sample_counts AS (SELECT metric_name, count(*) AS samples FROM signoz_metrics.distributed_samples_v4 WHERE unix_milli BETWEEN ? AND ? AND NOT startsWith(metric_name, 'signoz') AND fingerprint IN (SELECT fingerprint FROM __filtered_fingerprints) GROUP BY metric_name), __reduced_filtered_fingerprints AS (SELECT metric_name, fingerprint FROM signoz_metrics.distributed_time_series_v4_reduced WHERE unix_milli BETWEEN ? AND ? AND NOT startsWith(metric_name, 'signoz') AND __normalized = ? AND JSONExtractString(labels, 'host.name') = ? GROUP BY metric_name, fingerprint), __reduced_time_series_counts AS (SELECT metric_name, uniq(fingerprint) AS timeseries FROM __reduced_filtered_fingerprints GROUP BY metric_name), __reduced_sample_counts AS (SELECT metric_name, sum(cnt) AS samples FROM ((SELECT metric_name, uniq(reduced_fingerprint, unix_milli) AS cnt FROM signoz_metrics.distributed_samples_v4_reduced_last_60s WHERE unix_milli BETWEEN ? AND ? AND NOT startsWith(metric_name, 'signoz') AND reduced_fingerprint IN (SELECT fingerprint FROM __reduced_filtered_fingerprints) GROUP BY metric_name) UNION ALL (SELECT metric_name, uniq(reduced_fingerprint, unix_milli) AS cnt FROM signoz_metrics.distributed_samples_v4_reduced_sum_60s WHERE unix_milli BETWEEN ? AND ? AND NOT startsWith(metric_name, 'signoz') AND reduced_fingerprint IN (SELECT fingerprint FROM __reduced_filtered_fingerprints) GROUP BY metric_name)) AS reduced_samples GROUP BY metric_name) SELECT COALESCE(ts.metric_name, rts.metric_name, s.metric_name, rs.metric_name) AS metric_name, COALESCE(ts.timeseries, 0) + COALESCE(rts.timeseries, 0) AS timeseries, COALESCE(s.samples, 0) + COALESCE(rs.samples, 0) AS samples, COUNT(*) OVER() AS total FROM __time_series_counts ts FULL OUTER JOIN __reduced_time_series_counts rts ON ts.metric_name = rts.metric_name FULL OUTER JOIN __sample_counts s ON COALESCE(ts.metric_name, rts.metric_name) = s.metric_name FULL OUTER JOIN __reduced_sample_counts rs ON COALESCE(ts.metric_name, rts.metric_name, s.metric_name) = rs.metric_name WHERE (COALESCE(ts.timeseries, 0) + COALESCE(rts.timeseries, 0) > 0 OR COALESCE(s.samples, 0) + COALESCE(rs.samples, 0) > 0) ORDER BY samples DESC, metric_name ASC LIMIT ? OFFSET ?"
 	treemapTimeseriesNoFilterSQL         = "WITH __total_time_series AS (SELECT uniq(fingerprint) AS total_time_series FROM signoz_metrics.distributed_time_series_v4 WHERE unix_milli BETWEEN ? AND ? AND __normalized = ?), __metric_totals AS (SELECT metric_name, uniq(fingerprint) AS total_value FROM signoz_metrics.distributed_time_series_v4 WHERE unix_milli BETWEEN ? AND ? AND NOT startsWith(metric_name, 'signoz') AND __normalized = ? GROUP BY metric_name) SELECT mt.metric_name, mt.total_value, CASE WHEN tts.total_time_series = 0 THEN 0 ELSE (mt.total_value * 100.0 / tts.total_time_series) END AS percentage FROM __metric_totals mt JOIN __total_time_series tts ON 1=1 ORDER BY percentage DESC LIMIT ?"
 	treemapTimeseriesWithFilterSQL       = "WITH __total_time_series AS (SELECT uniq(fingerprint) AS total_time_series FROM signoz_metrics.distributed_time_series_v4 WHERE unix_milli BETWEEN ? AND ? AND __normalized = ?), __metric_totals AS (SELECT metric_name, uniq(fingerprint) AS total_value FROM signoz_metrics.distributed_time_series_v4 WHERE unix_milli BETWEEN ? AND ? AND NOT startsWith(metric_name, 'signoz') AND __normalized = ? AND JSONExtractString(labels, 'host.name') = ? GROUP BY metric_name) SELECT mt.metric_name, mt.total_value, CASE WHEN tts.total_time_series = 0 THEN 0 ELSE (mt.total_value * 100.0 / tts.total_time_series) END AS percentage FROM __metric_totals mt JOIN __total_time_series tts ON 1=1 ORDER BY percentage DESC LIMIT ?"
 	treemapSamplesNoFilterSQL            = "WITH __metric_candidates AS (SELECT metric_name FROM signoz_metrics.distributed_time_series_v4 WHERE NOT startsWith(metric_name, 'signoz') AND __normalized = ? AND unix_milli BETWEEN ? AND ? GROUP BY metric_name ORDER BY uniq(fingerprint) DESC LIMIT ?), __sample_counts AS (SELECT metric_name, count(*) AS samples FROM signoz_metrics.distributed_samples_v4 WHERE unix_milli BETWEEN ? AND ? AND metric_name GLOBAL IN (SELECT metric_name FROM __metric_candidates) GROUP BY metric_name), __total_samples AS (SELECT count(*) AS total_samples FROM signoz_metrics.distributed_samples_v4 WHERE unix_milli BETWEEN ? AND ?) SELECT mc.metric_name, COALESCE(sc.samples, 0) AS samples, CASE WHEN ts.total_samples = 0 THEN 0 ELSE (COALESCE(sc.samples, 0) * 100.0 / ts.total_samples) END AS percentage FROM __metric_candidates mc LEFT JOIN __sample_counts sc ON mc.metric_name = sc.metric_name JOIN __total_samples ts ON 1=1 ORDER BY percentage DESC LIMIT ?"
@@ -158,12 +158,12 @@ func TestGetStats(t *testing.T) {
 		noQuery   bool // SQL never reaches clickhouse (validation/build error)
 		wantCode  errors.Code
 	}{
-		{name: "NoFilter_FastPathSQL", expectSQL: statsNoFilterSQL, argCount: 10},
-		{name: "WhitespaceFilter_FastPathSQL", opts: []statsOpt{withStatsFilter("   ")}, expectSQL: statsNoFilterSQL, argCount: 10},
-		{name: "WithFilter_FingerprintSQL", opts: []statsOpt{withStatsFilter("host.name = 'foo'")}, seedKey: "host.name", expectSQL: statsWithFilterSQL, argCount: 12},
-		{name: "OrderByTimeseriesAsc", opts: []statsOpt{withStatsOrderBy("timeseries", qbtypes.OrderDirectionAsc)}, expectSQL: statsOrderTimeseriesSQL, argCount: 10},
+		{name: "NoFilter_FastPathSQL", expectSQL: statsNoFilterSQL, argCount: 17},
+		{name: "WhitespaceFilter_FastPathSQL", opts: []statsOpt{withStatsFilter("   ")}, expectSQL: statsNoFilterSQL, argCount: 17},
+		{name: "WithFilter_FingerprintSQL", opts: []statsOpt{withStatsFilter("host.name = 'foo'")}, seedKey: "host.name", expectSQL: statsWithFilterSQL, argCount: 20},
+		{name: "OrderByTimeseriesAsc", opts: []statsOpt{withStatsOrderBy("timeseries", qbtypes.OrderDirectionAsc)}, expectSQL: statsOrderTimeseriesSQL, argCount: 17},
 		{name: "OrderByInvalid", opts: []statsOpt{withStatsOrderBy("nonsense", qbtypes.OrderDirectionAsc)}, noQuery: true, wantCode: errors.CodeInvalidInput},
-		{name: "QueryError", queryErr: assert.AnError, expectSQL: statsNoFilterSQL, argCount: 10, wantCode: errors.CodeInternal},
+		{name: "QueryError", queryErr: assert.AnError, expectSQL: statsNoFilterSQL, argCount: 17, wantCode: errors.CodeInternal},
 		{name: "InvalidRequest_Limit", opts: []statsOpt{withStatsLimit(0)}, noQuery: true, wantCode: errors.CodeInvalidInput},
 	}
 

pkg/querier/querier.go

@@ -408,7 +408,7 @@ func (q *querier) resolveMetricMetadata(ctx context.Context, orgID valuer.UUID,
 
 	// Classify each missing metric: never-seen -> warning with empty result;
 	// seen-but-no-data-in-window -> dormant warning.
-	lastSeenInfo, _ := q.metadataStore.FetchLastSeenInfoMulti(ctx, externalMissingMetrics...)
+	lastSeenInfo, _ := q.metadataStore.FetchLastSeenInfoMulti(ctx, orgID, externalMissingMetrics...)
 	var nonExistentMetrics []string
 	var dormantMetrics []string
 	for _, name := range externalMissingMetrics {

pkg/telemetrymetadata/metadata.go

@@ -2525,12 +2525,33 @@ func (t *telemetryMetaStore) GetFirstSeenFromMetricMetadata(ctx context.Context,
 	return result, nil
 }
 
-func (t *telemetryMetaStore) FetchLastSeenInfoMulti(ctx context.Context, metricNames ...string) (map[string]int64, error) {
+func (t *telemetryMetaStore) FetchLastSeenInfoMulti(ctx context.Context, orgID valuer.UUID, metricNames ...string) (map[string]int64, error) {
+	lastSeenInfo, err := t.fetchLastSeenInfoForTable(ctx, telemetrymetrics.TimeseriesV4TableName, metricNames)
+	if err != nil {
+		return nil, err
+	}
+
+	if t.fl.BooleanOrEmpty(ctx, flagger.FeatureEnableMetricsReduction, featuretypes.NewFlaggerEvaluationContext(orgID)) {
+		reducedLastSeen, err := t.fetchLastSeenInfoForTable(ctx, telemetrymetrics.TimeseriesV4ReducedTableName, metricNames)
+		if err != nil {
+			return nil, err
+		}
+		for metricName, ts := range reducedLastSeen {
+			if ts > lastSeenInfo[metricName] {
+				lastSeenInfo[metricName] = ts
+			}
+		}
+	}
+
+	return lastSeenInfo, nil
+}
+
+func (t *telemetryMetaStore) fetchLastSeenInfoForTable(ctx context.Context, tableName string, metricNames []string) (map[string]int64, error) {
 	sb := sqlbuilder.Select(
 		"metric_name",
 		"max(unix_milli)",
 	).
-		From(t.metricsDBName + "." + telemetrymetrics.TimeseriesV4TableName)
+		From(t.metricsDBName + "." + tableName)
 	sb.Where(sb.In("metric_name", metricNames))
 	sb.GroupBy("metric_name")
 

pkg/types/metricreductionruletypes/list.go

@@ -26,16 +26,15 @@ var (
 	OrderByMetricName     = ReductionRuleOrderBy{valuer.NewString("metric")}
 	OrderByIngestedVolume = ReductionRuleOrderBy{valuer.NewString("ingested_volume")}
 	OrderByReducedVolume  = ReductionRuleOrderBy{valuer.NewString("reduced_volume")}
-	OrderByReduction      = ReductionRuleOrderBy{valuer.NewString("reduction")}
 	OrderByLastUpdated    = ReductionRuleOrderBy{valuer.NewString("last_updated")}
 )
 
 func (ReductionRuleOrderBy) Enum() []any {
-	return []any{OrderByMetricName, OrderByIngestedVolume, OrderByReducedVolume, OrderByReduction, OrderByLastUpdated}
+	return []any{OrderByMetricName, OrderByIngestedVolume, OrderByReducedVolume, OrderByLastUpdated}
 }
 
 type ListReductionRulesParams struct {
-	OrderBy    ReductionRuleOrderBy `query:"orderBy,default=reduction" json:"orderBy"`
+	OrderBy    ReductionRuleOrderBy `query:"orderBy,default=ingested_volume" json:"orderBy"`
 	Order      Order                `query:"order,default=desc" json:"order"`
 	Search     string               `query:"search" json:"search"`
 	MetricName string               `query:"metricName" json:"metricName,omitempty"`

pkg/types/metricreductionruletypes/list_test.go

@@ -13,7 +13,7 @@ func TestListReductionRulesParamsSortDefaults(t *testing.T) {
 	var params metricreductionruletypes.ListReductionRulesParams
 	require.NoError(t, binding.Query.BindQuery(map[string][]string{"limit": {"10"}}, &params))
 
-	assert.Equal(t, metricreductionruletypes.OrderByReduction, params.OrderBy, "orderBy defaults to reduction")
+	assert.Equal(t, metricreductionruletypes.OrderByIngestedVolume, params.OrderBy, "orderBy defaults to ingested volume")
 	assert.Equal(t, metricreductionruletypes.OrderDesc, params.Order, "order defaults to desc")
 }
 

pkg/types/metricreductionruletypes/reduction_rule.go

@@ -102,7 +102,8 @@ type GettableReductionRule struct {
 	Active           bool      `json:"active" required:"true"`
 	IngestedSeries   uint64    `json:"ingestedSeries" required:"true"`
 	RetainedSeries   uint64    `json:"retainedSeries" required:"true"`
-	ReductionPercent float64   `json:"reductionPercent" required:"true"`
+	IngestedSamples  uint64    `json:"ingestedSamples" required:"true"`
+	RetainedSamples  uint64    `json:"retainedSamples" required:"true"`
 }
 
 type GettableReductionRules struct {

pkg/types/metricreductionruletypes/stats.go

@@ -4,5 +4,7 @@ package metricreductionruletypes
 type GettableReductionRuleStats struct {
 	IngestedSeries             uint64  `json:"ingestedSeries" required:"true"`
 	RetainedSeries             uint64  `json:"retainedSeries" required:"true"`
+	IngestedSamples            uint64  `json:"ingestedSamples" required:"true"`
+	RetainedSamples            uint64  `json:"retainedSamples" required:"true"`
 	EstimatedMonthlySavingsUsd float64 `json:"estimatedMonthlySavingsUsd" required:"true"`
 }

pkg/types/telemetrytypes/store.go

@@ -46,7 +46,7 @@ type MetadataStore interface {
 	// GetFirstSeenFromMetricMetadata gets the first seen timestamp for a metric metadata lookup key.
 	GetFirstSeenFromMetricMetadata(ctx context.Context, lookupKeys []MetricMetadataLookupKey) (map[MetricMetadataLookupKey]int64, error)
 
-	FetchLastSeenInfoMulti(ctx context.Context, metricNames ...string) (map[string]int64, error)
+	FetchLastSeenInfoMulti(ctx context.Context, orgID valuer.UUID, metricNames ...string) (map[string]int64, error)
 }
 
 type MetricMetadataLookupKey struct {

pkg/types/telemetrytypes/telemetrytypestest/metadata_store.go

@@ -419,6 +419,6 @@ func (m *MockMetadataStore) SetFirstSeenFromMetricMetadata(firstSeenMap map[tele
 	}
 }
 
-func (m *MockMetadataStore) FetchLastSeenInfoMulti(ctx context.Context, metricNames ...string) (map[string]int64, error) {
+func (m *MockMetadataStore) FetchLastSeenInfoMulti(ctx context.Context, orgID valuer.UUID, metricNames ...string) (map[string]int64, error) {
 	return make(map[string]int64), nil
 }