diff --git a/src/backend/common/database/drizzle/repositories/PlayRepository.ts b/src/backend/common/database/drizzle/repositories/PlayRepository.ts
index 2177f2c2..14c9839d 100644
--- a/src/backend/common/database/drizzle/repositories/PlayRepository.ts
+++ b/src/backend/common/database/drizzle/repositories/PlayRepository.ts
@@ -705,6 +705,14 @@ group by state;`);
 group by state,componentId;`);
         return res;
     }
+
+    public getCompactedPlayCountByComponent = async () => {
+
+        const res = await this.db.all(sql`select componentId,compacted,count(*) from plays p
+where compacted IS NOT NULL
+group by componentId,compacted;`);
+        return res;
+    }
 }
 
 export const getTemporallyCloseDateCompareOp = (play: PlayObject, opts: {bufferTime?: number, useCompleted?: boolean} = {}): CompareDateOp => {
diff --git a/src/backend/server/api.ts b/src/backend/server/api.ts
index 6c63ad38..84bf1632 100644
--- a/src/backend/server/api.ts
+++ b/src/backend/server/api.ts
@@ -611,6 +611,22 @@ export const setupApi = (app: Express, logger: Logger, appLoggerStream: PassThro
                     }
                 }
     });
+    const sourceRetention = new prom.Gauge({
+                name: 'multiscrobbler_source_plays_compacted',
+                help: 'Count of compacted, stored plays by compaction type for Sources',
+                labelNames: ['name', 'type'],
+                async collect() {
+                    const res = await playRepo.getCompactedPlayCountByComponent();
+                    for(const source of scrobbleSources.sources) {
+                        const relevant = res.filter(x => x['componentId'] === source.componentId);
+                        for(const s of ['input','transform','input-transform']) {
+                            const rel = relevant.find(x => x['compacted'] === s);
+                            const count = rel === undefined ? 0 : rel['count(*)'];
+                            this.labels({name: source.getSafeExternalName(), type: s}).set(count);
+                        }
+                    }
+                }
+    });
     const clientPlays = new prom.Gauge({
                 name: 'multiscrobbler_client_plays',
                 help: 'Count of stored plays by state for Clients',
@@ -627,6 +643,22 @@ export const setupApi = (app: Express, logger: Logger, appLoggerStream: PassThro
                     }
                 }
     });
+    const clientRetention = new prom.Gauge({
+                name: 'multiscrobbler_client_plays_compacted',
+                help: 'Count of compacted, stored plays by compaction type for Clients',
+                labelNames: ['name', 'type'],
+                async collect() {
+                    const res = await playRepo.getCompactedPlayCountByComponent();
+                    for(const client of scrobbleClients.clients) {
+                        const relevant = res.filter(x => x['componentId'] === client.componentId);
+                        for(const s of ['input','transform','input-transform']) {
+                            const rel = relevant.find(x => x['compacted'] === s);
+                            const count = rel === undefined ? 0 : rel['count(*)'];
+                            this.labels({name: client.getSafeExternalName(), type: s}).set(count);
+                        }
+                    }
+                }
+    });
     const clientHistoricalPlays = new prom.Gauge({
                 name: 'multiscrobbler_client_historical_plays',
                 help: 'Count of stored historical plays for Clients',