diff --git a/playbooks/roles/gerrit/templates/gerrit.config b/playbooks/roles/gerrit/templates/gerrit.config
index 8452c519a2..acdb33aff5 100644
--- a/playbooks/roles/gerrit/templates/gerrit.config
+++ b/playbooks/roles/gerrit/templates/gerrit.config
@@ -20,6 +20,7 @@
 	smtpServer = localhost
 	from = MIXED
 	includeDiff = false
+	threadPoolSize = 4
 [container]
 	user = gerrit2
 	startupTimeout = 300