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
diff --git a/metadata/service/mon/single.yml b/metadata/service/mon/single.yml
index 8be5da5..ea04ea0 100644
--- a/metadata/service/mon/single.yml
+++ b/metadata/service/mon/single.yml
@@ -12,6 +12,9 @@
           caps:
             mon: "allow *"
     common:
+      config:
+        mon:
+          mon_max_pg_per_osd: 600
       keyring:
         admin:
           caps: