diff --git a/src/bin/gs_guc/cluster_guc.conf b/src/bin/gs_guc/cluster_guc.conf
index 99d585726..33fb7dddf 100755
--- a/src/bin/gs_guc/cluster_guc.conf
+++ b/src/bin/gs_guc/cluster_guc.conf
@@ -643,7 +643,6 @@ disable_memory_protect|bool|0,0|NULL|NULL|
 segment_buffers|int|16,1073741823|kB|NULL|
 default_index_kind|int|0,2|NULL|NULL|
 undo_zone_count|int|0,1048576|NULL|NULL|
-unique_sql_clean_ratio|real|0,0.2|NULL|NULL|
 enable_auto_clean_unique_sql|bool|0,0|NULL|NULL|
 [cmserver]
 log_dir|string|0,0|NULL|NULL|
diff --git a/src/common/backend/utils/misc/guc/guc_resource.cpp b/src/common/backend/utils/misc/guc/guc_resource.cpp
index d9ca8738c..d0dca50ee 100644
--- a/src/common/backend/utils/misc/guc/guc_resource.cpp
+++ b/src/common/backend/utils/misc/guc/guc_resource.cpp
@@ -145,7 +145,6 @@
 #include "utils/guc_resource.h"
 
 const int NO_LIMIT_SIZE = -1;
-#define UNIQUE_SQL_DEFAULT_CLEAN_RATIO 0.1
 
 static void assign_statistics_memory(int newval, void* extra);
 static bool check_cgroup_name(char** newval, void** extra, GucSource source);
@@ -167,9 +166,6 @@ static const char* show_enable_dynamic_workload(void);
 static void assign_control_group(const bool newval, void* extra);
 static void assign_enable_cgroup_switch(bool newval, void* extra);
 static void assign_memory_quota(int newval, void* extra);
-#ifndef ENABLE_MULTIPLE_NODES
-static bool CheckUniqueSqlCleanRatio(double* newval, void** extra, GucSource source);
-#endif
 
 static void InitResourceConfigureNamesBool();
 static void InitResourceConfigureNamesInt();
@@ -823,24 +819,7 @@ static void InitResourceConfigureNamesInt()
 static void InitResourceConfigureNamesReal()
 {
     struct config_real localConfigureNamesReal[] = {
-#ifndef ENABLE_MULTIPLE_NODES
-        {{"unique_sql_clean_ratio",
-          PGC_POSTMASTER,
-          NODE_ALL,
-          RESOURCES_WORKLOAD,
-          gettext_noop("The percentage of the UniquesQl hash table"),
-          gettext_noop("The percentage of the UniquesQl hash table that will be "
-                       "automatically eliminated when the UniquesQl hash table "
-                       "is full. 0 means that auto-eliminate is not enabled."),
-          },
-         &u_sess->attr.attr_common.unique_sql_clean_ratio,
-         UNIQUE_SQL_DEFAULT_CLEAN_RATIO,
-         0,
-         0.2,
-         CheckUniqueSqlCleanRatio,
-         NULL,
-         NULL},
-#endif
+
         /* End-of-list marker */
         {{NULL,
             (GucContext)0,
@@ -1323,18 +1302,3 @@ static void assign_memory_quota(int newval, void* extra)
         gs_compare_and_swap_32(&srvmgr->freesize, old_freesize_limit, srvmgr->freesize_limit);
     }
 }
-
-#ifndef ENABLE_MULTIPLE_NODES
-static bool CheckUniqueSqlCleanRatio(double* newval, void** extra, GucSource source)
-{
-    if (g_instance.attr.attr_common.enable_auto_clean_unique_sql && *newval == 0) {
-        ereport(WARNING,
-                (errmsg("Can't set unique_sql_clean_ratio to 0 when enable_auto_clean_unique_sql is true. "
-                        "Reset it's value to default(%lf). If you want to disable auto clean unique sql, "
-                        "please set enable_auto_clean_unique_sql to false.",
-                        UNIQUE_SQL_DEFAULT_CLEAN_RATIO)));
-        *newval = UNIQUE_SQL_DEFAULT_CLEAN_RATIO;
-    }
-    return true;
-}
-#endif
diff --git a/src/gausskernel/cbb/instruments/unique_sql/instr_unique_sql.cpp b/src/gausskernel/cbb/instruments/unique_sql/instr_unique_sql.cpp
index deaa61024..d7302bc9c 100755
--- a/src/gausskernel/cbb/instruments/unique_sql/instr_unique_sql.cpp
+++ b/src/gausskernel/cbb/instruments/unique_sql/instr_unique_sql.cpp
@@ -2502,8 +2502,8 @@ static bool AutoRecycleUniqueSQLEntry()
             (errmodule(MOD_INSTR), errcode(ERRCODE_LOG), errmsg("[UniqueSQL] instr_unique_sql_count is too large, uniquesql auto-clean will not happen.")));
         return false;
     }
-    double ratio = u_sess->attr.attr_common.unique_sql_clean_ratio;
-    int cleanCount = Max(int(ratio * instr_unique_sql_count + totalCount - instr_unique_sql_count), 1);
+    const double cleanRatio = 0.1;
+    int cleanCount = Max(int(cleanRatio * instr_unique_sql_count + totalCount - instr_unique_sql_count), 1);
     /* get remove entry list */
     KeyUpdatedtime* removeList = GetSortedEntryList();
     if (removeList == NULL) {
diff --git a/src/include/catalog/upgrade_sql/set_guc/delete_guc b/src/include/catalog/upgrade_sql/set_guc/delete_guc
index 7b0e20e4c..3c66288d7 100644
--- a/src/include/catalog/upgrade_sql/set_guc/delete_guc
+++ b/src/include/catalog/upgrade_sql/set_guc/delete_guc
@@ -12,3 +12,4 @@ comm_tcp_mode datanode
 comm_usable_memory datanode
 minimum_pool_size datanode
 pooler_maximum_idle_time datanode
+unique_sql_clean_ratio datanode
diff --git a/src/include/knl/knl_guc/knl_session_attr_common.h b/src/include/knl/knl_guc/knl_session_attr_common.h
index eed9c87b7..46c32d009 100644
--- a/src/include/knl/knl_guc/knl_session_attr_common.h
+++ b/src/include/knl/knl_guc/knl_session_attr_common.h
@@ -178,9 +178,6 @@ typedef struct knl_session_attr_common {
 
     /* instrumentation guc parameters */
     int instr_unique_sql_count;
-#ifndef ENABLE_MULTIPLE_NODES
-    double unique_sql_clean_ratio;
-#endif
     bool enable_instr_cpu_timer;
     int unique_sql_track_type;
     bool enable_instr_track_wait;