diff --git a/src/share/parameter/ob_parameter_seed.ipp b/src/share/parameter/ob_parameter_seed.ipp
index c4692cffe9..ea168615a7 100755
--- a/src/share/parameter/ob_parameter_seed.ipp
+++ b/src/share/parameter/ob_parameter_seed.ipp
@@ -200,8 +200,8 @@ DEF_BOOL(enable_syslog_recycle, OB_CLUSTER_PARAMETER, "False",
          "specifies whether log file recycling is turned on. "
          "Value: True：turned on; False: turned off",
          ObParameterAttr(Section::OBSERVER, Source::DEFAULT, EditLevel::DYNAMIC_EFFECTIVE));
-DEF_INT(memory_limit_percentage, OB_CLUSTER_PARAMETER, "80", "[10, 90]",
-        "the size of the memory reserved for internal use(for testing purpose). Range: [10, 90]",
+DEF_INT(memory_limit_percentage, OB_CLUSTER_PARAMETER, "80", "[10, 95]",
+        "the size of the memory reserved for internal use(for testing purpose). Range: [10, 95]",
         ObParameterAttr(Section::OBSERVER, Source::DEFAULT, EditLevel::DYNAMIC_EFFECTIVE));
 DEF_CAP(cache_wash_threshold, OB_CLUSTER_PARAMETER, "4GB", "[0B,]",
         "size of remaining memory at which cache eviction will be triggered. Range: [0,+∞)",
diff --git a/src/storage/tx/ob_trans_part_ctx.cpp b/src/storage/tx/ob_trans_part_ctx.cpp
index 79aa8c518e..9f88175b0a 100755
--- a/src/storage/tx/ob_trans_part_ctx.cpp
+++ b/src/storage/tx/ob_trans_part_ctx.cpp
@@ -5686,6 +5686,7 @@ int ObPartTransCtx::switch_to_follower_gracefully(ObIArray<ObTxCommitCallback> &
     if (pending_write_) {
       TRANS_LOG(INFO, "current tx is executing stmt", K(*this));
       mt_ctx_.wait_pending_write();
+      timeguard.click();
       need_submit_log = true;
     } else if (!is_committing_()) {
       need_submit_log = true;