diff --git a/metadata/service/mon/cluster.yml b/metadata/service/mon/cluster.yml
index 6a10da2..94c484b 100644
--- a/metadata/service/mon/cluster.yml
+++ b/metadata/service/mon/cluster.yml
@@ -7,3 +7,7 @@
   ceph:
     mon:
       enabled: true
+    common:
+      config:
+        mon:
+          mon_max_pg_per_osd: 600