diff --git a/src/share/parameter/ob_parameter_seed.ipp b/src/share/parameter/ob_parameter_seed.ipp
index 256b9bfa9e..45fef70cf2 100755
--- a/src/share/parameter/ob_parameter_seed.ipp
+++ b/src/share/parameter/ob_parameter_seed.ipp
@@ -731,7 +731,7 @@ DEF_INT(rpc_memory_limit_percentage, OB_TENANT_PARAMETER, "0", "[0,100]",
          "maximum memory for rpc in a tenant, as a percentage of total tenant memory, "
          "and 0 means no limit to rpc memory",
         ObParameterAttr(Section::RPC, Source::DEFAULT, EditLevel::DYNAMIC_EFFECTIVE));
-DEF_CAP(_max_rpc_packet_size, OB_CLUSTER_PARAMETER, "64MB", "[2M,2047M]",
+DEF_CAP(_max_rpc_packet_size, OB_CLUSTER_PARAMETER, "2047MB", "[2M,2047M]",
         "the max rpc packet size when sending RPC or responding RPC results",
         ObParameterAttr(Section::OBSERVER, Source::DEFAULT, EditLevel::DYNAMIC_EFFECTIVE));
 DEF_CAP(standby_fetch_log_bandwidth_limit, OB_CLUSTER_PARAMETER, "0MB", "[0M,10000G]",