diff --git a/src/bin/gs_guc/cluster_guc.conf b/src/bin/gs_guc/cluster_guc.conf
index aeb8f93e6..af5aaea40 100755
--- a/src/bin/gs_guc/cluster_guc.conf
+++ b/src/bin/gs_guc/cluster_guc.conf
@@ -714,8 +714,8 @@ undo_zone_count|int|0,1048576|NULL|NULL|
 stream_cluster_run_mode|enum|cluster_primary,cluster_standby|NULL|NULL|
 xlog_file_size|int64|1048576,576460752303423487|B|The value must be an integer multiple of 16777216(16M)|
 xlog_file_path|string|0,0|NULL|NULL|
-max_standby_base_page_size|int64|1073741824,576460752303423487|B|NULL|
-max_standby_lsn_info_size|int64|1073741824,576460752303423487|B|NULL|
+max_standby_base_page_size|int64|1048576,562949953421311|kB|NULL|
+max_standby_lsn_info_size|int64|1048576,562949953421311|kB|NULL|
 plsql_show_all_error|bool|0,0|NULL|NULL|
 partition_page_estimation|bool|0,0|NULL|NULL|
 enable_auto_clean_unique_sql|bool|0,0|NULL|NULL|