diff --git a/src/db/KyselyLogger.ts b/src/db/KyselyLogger.ts
index e39cbd08..ee9cea8c 100644
--- a/src/db/KyselyLogger.ts
+++ b/src/db/KyselyLogger.ts
@@ -1,5 +1,6 @@
 import { Stickynotes } from '@soapbox/stickynotes';
 import { Logger } from 'kysely';
+import { dbQueryTimeHistogram } from '@/metrics.ts';
 
 /** Log the SQL for queries. */
 export const KyselyLogger: Logger = (event) => {
@@ -9,6 +10,8 @@ export const KyselyLogger: Logger = (event) => {
     const { query, queryDurationMillis } = event;
     const { sql, parameters } = query;
 
+    dbQueryTimeHistogram.observe(queryDurationMillis);
+
     console.debug(
       sql,
       JSON.stringify(parameters),
diff --git a/src/metrics.ts b/src/metrics.ts
index 68ddfcef..3492bb6b 100644
--- a/src/metrics.ts
+++ b/src/metrics.ts
@@ -1,4 +1,4 @@
-import { Counter, Gauge } from 'prom-client';
+import { Counter, Gauge, Histogram } from 'prom-client';
 
 export const httpRequestCounter = new Counter({
   name: 'http_requests_total',
@@ -67,3 +67,8 @@ export const dbAvailableConnectionsGauge = new Gauge({
   name: 'db_available_connections',
   help: 'Number of available connections in the database pool',
 });
+
+export const dbQueryTimeHistogram = new Histogram({
+  name: 'db_query_duration_seconds',
+  help: 'Duration of database queries',
+});