diff --git a/src/bin/gs_guc/cluster_guc.conf b/src/bin/gs_guc/cluster_guc.conf
index bd587bef8..2ffd46d20 100755
--- a/src/bin/gs_guc/cluster_guc.conf
+++ b/src/bin/gs_guc/cluster_guc.conf
@@ -760,6 +760,7 @@ light_comm|bool|0,0|NULL|NULL|
 ignore_standby_lsn_window|int|0,2147483647|ms|NULL|
 ignore_feedback_xmin_window|int|0,2147483647|ms|NULL|
 ss_enable_bcast_snapshot|bool|0,0|NULL|NULL|
+ss_txnstatus_cache_size|int|0,524288|NULL|NULL|
 subscription_conflict_resolution|enum|error,apply_remote,keep_local|NULL|NULL|
 time_record_level|int|0,10|NULL|NULL|
 [cmserver]