diff --git a/coderd/database/dump.sql b/coderd/database/dump.sql
index 273ef55b96..0eecbc30e8 100644
--- a/coderd/database/dump.sql
+++ b/coderd/database/dump.sql
@@ -2939,6 +2939,8 @@ CREATE UNIQUE INDEX idx_users_username ON users USING btree (username) WHERE (de
 
 CREATE INDEX idx_workspace_app_statuses_workspace_id_created_at ON workspace_app_statuses USING btree (workspace_id, created_at DESC);
 
+CREATE INDEX idx_workspace_builds_initiator_id ON workspace_builds USING btree (initiator_id);
+
 CREATE UNIQUE INDEX notification_messages_dedupe_hash_idx ON notification_messages USING btree (dedupe_hash);
 
 CREATE UNIQUE INDEX organizations_single_default_org ON organizations USING btree (is_default) WHERE (is_default = true);
diff --git a/coderd/database/migrations/000363_workspace_build_initiator_index.down.sql b/coderd/database/migrations/000363_workspace_build_initiator_index.down.sql
new file mode 100644
index 0000000000..5b6a5aee3c
--- /dev/null
+++ b/coderd/database/migrations/000363_workspace_build_initiator_index.down.sql
@@ -0,0 +1,2 @@
+-- Remove index on workspace_builds.initiator_id
+DROP INDEX IF EXISTS idx_workspace_builds_initiator_id;
diff --git a/coderd/database/migrations/000363_workspace_build_initiator_index.up.sql b/coderd/database/migrations/000363_workspace_build_initiator_index.up.sql
new file mode 100644
index 0000000000..162f45d544
--- /dev/null
+++ b/coderd/database/migrations/000363_workspace_build_initiator_index.up.sql
@@ -0,0 +1,6 @@
+-- Add index on workspace_builds.initiator_id to optimize prebuild queries
+-- This will dramatically improve performance for:
+-- - GetPrebuildMetrics (called every 15 seconds)
+-- - Any other queries using workspace_prebuild_builds view
+-- - Provisioner job queue prioritization
+CREATE INDEX idx_workspace_builds_initiator_id ON workspace_builds (initiator_id);
diff --git a/enterprise/coderd/prebuilds/metricscollector.go b/enterprise/coderd/prebuilds/metricscollector.go
index 97b295dd19..f3b808e4c8 100644
--- a/enterprise/coderd/prebuilds/metricscollector.go
+++ b/enterprise/coderd/prebuilds/metricscollector.go
@@ -105,7 +105,7 @@ var (
 )
 
 const (
-	metricsUpdateInterval = time.Second * 15
+	metricsUpdateInterval = time.Second * 60
 	metricsUpdateTimeout  = time.Second * 10
 )