diff --git a/src/bin/gs_guc/cluster_guc.conf b/src/bin/gs_guc/cluster_guc.conf
index fba624057b2d704d37a313f863ce0a010c04e6c3..39fd5a6a5272ae1dbb8ed2683e210515c44dd0a1 100755
--- a/src/bin/gs_guc/cluster_guc.conf
+++ b/src/bin/gs_guc/cluster_guc.conf
@@ -863,6 +863,7 @@ enable_pq|bool|0,0|NULL|NULL|
 ivfpq_kreorder|int|0,2147483647|NULL|NULL|
 enable_query_parameterization|bool|0,0|NULL|NULL|
 max_parameterized_query_stored|int|1,512|NULL|NULL|
+enable_lc_xlog_flush_optimize|bool|0,0|NULL|NULL|
 [cmserver]
 log_dir|string|0,0|NULL|NULL|
 log_file_size|int|0,2047|MB|NULL|