diff --git a/src/gausskernel/process/postmaster/postmaster.cpp b/src/gausskernel/process/postmaster/postmaster.cpp
index 55052a18d..f4b39d64f 100755
--- a/src/gausskernel/process/postmaster/postmaster.cpp
+++ b/src/gausskernel/process/postmaster/postmaster.cpp
@@ -2785,12 +2785,16 @@ static int ServerLoop(void)
         }
 
         /* If we have lost the archiver, try to start a new one */
-        if (XLogArchivingActive() && g_instance.pid_cxt.PgArchPID == 0 && !dummyStandbyMode) {
-            if (pmState == PM_RUN || pmState == PM_HOT_STANDBY || pmState == PM_RECOVERY) {
+        if (XLogArchivingActive() && g_instance.pid_cxt.PgArchPID == 0 && !dummyStandbyMode){
+            if (pmState == PM_RUN) {
                 g_instance.pid_cxt.PgArchPID = pgarch_start();
+            } else if (pmState == PM_HOT_STANDBY) {
+                obs_slot = getObsReplicationSlot();
+                if (obs_slot != NULL) {
+                    g_instance.pid_cxt.PgArchPID = pgarch_start();
+                }
             }
         }
-
         /* If we have lost the stats collector, try to start a new one */
         if (g_instance.pid_cxt.PgStatPID == 0 && (pmState == PM_RUN || pmState == PM_HOT_STANDBY) && !dummyStandbyMode)
             g_instance.pid_cxt.PgStatPID = pgstat_start();
diff --git a/src/gausskernel/storage/replication/walreceiver.cpp b/src/gausskernel/storage/replication/walreceiver.cpp
index 91756473a..283ed7dd3 100644
--- a/src/gausskernel/storage/replication/walreceiver.cpp
+++ b/src/gausskernel/storage/replication/walreceiver.cpp
@@ -125,10 +125,8 @@ const char *g_reserve_param[RESERVE_SIZE] = {
     "archive_dest",
 #ifndef ENABLE_MULTIPLE_NODES
     "recovery_min_apply_delay",
-    "archive_mode",
     "sync_config_strategy"
 #else
-    NULL,
     NULL,
     NULL
 #endif
diff --git a/src/gausskernel/storage/replication/walsender.cpp b/src/gausskernel/storage/replication/walsender.cpp
index 46728566f..619a96253 100644
--- a/src/gausskernel/storage/replication/walsender.cpp
+++ b/src/gausskernel/storage/replication/walsender.cpp
@@ -3197,6 +3197,7 @@ static int WalSndLoop(WalSndSendDataCallback send_data)
         /* Check for input from the client */
         ProcessRepliesIfAny();
 
+#ifdef ENABLE_MULTIPLE_NODES
         /* Only the primary can send the archive lsn to standby */
         load_server_mode();
         if (t_thrd.xlog_cxt.server_mode == PRIMARY_MODE && IsValidArchiverStandby(t_thrd.walsender_cxt.MyWalSnd)) {
@@ -3230,6 +3231,7 @@ static int WalSndLoop(WalSndSendDataCallback send_data)
             WalSndSendArchiveLsn2Standby(t_thrd.walsender_cxt.MyWalSnd->arch_task_lsn);
             pg_atomic_write_u32(standby_archive_flag, 0);
         } 
+#endif
 
         /* Walsender first startup, send a keepalive to standby, no need reply. */
         if (first_startup) {
diff --git a/src/include/knl/knl_thread.h b/src/include/knl/knl_thread.h
index 48ef97bad..a6b061e1b 100644
--- a/src/include/knl/knl_thread.h
+++ b/src/include/knl/knl_thread.h
@@ -67,7 +67,7 @@
 #include "pgxc/barrier.h"
 #define MAX_PATH_LEN 1024
 
-#define RESERVE_SIZE 36
+#define RESERVE_SIZE 35
 
 typedef struct ResourceOwnerData* ResourceOwner;