diff --git a/src/gausskernel/process/threadpool/knl_thread.cpp b/src/gausskernel/process/threadpool/knl_thread.cpp
index 411316e5..b4758722 100644
--- a/src/gausskernel/process/threadpool/knl_thread.cpp
+++ b/src/gausskernel/process/threadpool/knl_thread.cpp
@@ -1306,6 +1306,7 @@ static void knl_t_walsender_init(knl_t_walsender_context* walsender_cxt)
     walsender_cxt->walSndCaughtUp = false;
     walsender_cxt->advancePrimaryConn = NULL;
     walsender_cxt->last_check_timeout_timestamp = 0;
+    walsender_cxt->timeoutCheckInternal = 0;
 }
 
 static void knl_t_tsearch_init(knl_t_tsearch_context* tsearch_cxt)
diff --git a/src/gausskernel/storage/replication/walsender.cpp b/src/gausskernel/storage/replication/walsender.cpp
index ad24f38f..78813a30 100644
--- a/src/gausskernel/storage/replication/walsender.cpp
+++ b/src/gausskernel/storage/replication/walsender.cpp
@@ -3105,6 +3105,12 @@ static int WalSndLoop(WalSndSendDataCallback send_data)
     last_syncconf_timestamp = GetCurrentTimestamp();
     t_thrd.walsender_cxt.last_logical_xlog_advanced_timestamp = GetCurrentTimestamp();
     t_thrd.walsender_cxt.waiting_for_ping_response = false;
+#define MINUTE_30 (30 * 60 * 1000) /* 30 minutes */
+    t_thrd.walsender_cxt.timeoutCheckInternal = u_sess->attr.attr_storage.wal_sender_timeout;
+    if (strcmp(u_sess->attr.attr_common.application_name, "gs_probackup") == 0 &&
+        t_thrd.walsender_cxt.timeoutCheckInternal < MINUTE_30) {
+        t_thrd.walsender_cxt.timeoutCheckInternal = MINUTE_30;
+    }
 
     /* Loop forever, unless we get an error */
     for (;;) {
@@ -3601,9 +3607,9 @@ static inline TimestampTz CalculateTimeout(TimestampTz last_reply_time)
 
     if (walsnd->sendRole == SNDROLE_PRIMARY_BUILDSTANDBY) {
         return TimestampTzPlusMilliseconds(last_reply_time,
-                                           MULTIPLE_TIME * u_sess->attr.attr_storage.wal_sender_timeout);
+                                           MULTIPLE_TIME * t_thrd.walsender_cxt.timeoutCheckInternal);
     } else {
-        return TimestampTzPlusMilliseconds(last_reply_time, u_sess->attr.attr_storage.wal_sender_timeout);
+        return TimestampTzPlusMilliseconds(last_reply_time, t_thrd.walsender_cxt.timeoutCheckInternal);
     }
 }
 
diff --git a/src/include/knl/knl_thread.h b/src/include/knl/knl_thread.h
index 48ef97ba..337238f9 100644
--- a/src/include/knl/knl_thread.h
+++ b/src/include/knl/knl_thread.h
@@ -2193,6 +2193,12 @@ typedef struct knl_t_walsender_context {
     struct pg_conn* advancePrimaryConn;
     /* Timestamp of the last check-timeout time in WalSndCheckTimeOut. */
     TimestampTz last_check_timeout_timestamp;
+    /*
+     * Actual timeout for guc wal_sender_timeout, default value is wal_sender_timeout.
+     * timeoutCheckInternal will greater than or equal to 30 minutes for gs_probackup. It is so
+     * hackly of 30 minutes, but now, 30 minutes is enough.
+     */
+    int timeoutCheckInternal;
 } knl_t_walsender_context;
 
 typedef struct knl_t_walreceiverfuncs_context {