diff --git a/src/share/parameter/ob_parameter_seed.ipp b/src/share/parameter/ob_parameter_seed.ipp
index 2157ce9507..12d85bdf91 100644
--- a/src/share/parameter/ob_parameter_seed.ipp
+++ b/src/share/parameter/ob_parameter_seed.ipp
@@ -1820,3 +1820,8 @@ DEF_BOOL(enable_rpc_authentication_bypass, OB_CLUSTER_PARAMETER, "True",
         "specifies whether allow arbitration service, standby cluster, OMS service to connect "
         "cluster and provide service when rpc authentication is turned on.",
         ObParameterAttr(Section::OBSERVER, Source::DEFAULT, EditLevel::DYNAMIC_EFFECTIVE));
+
+// take up space on the master for checkpoint diagnose in 42x
+// DEF_INT(_checkpoint_diagnose_preservation_count, OB_TENANT_PARAMETER, "100", "[0,1000]",
+//         "the count of checkpoint diagnose info preservation",
+//         ObParameterAttr(Section::TENANT, Source::DEFAULT, EditLevel::DYNAMIC_EFFECTIVE));