diff --git a/src/sql/das/ob_das_define.h b/src/sql/das/ob_das_define.h
index de5730e16..f0864f328 100644
--- a/src/sql/das/ob_das_define.h
+++ b/src/sql/das/ob_das_define.h
@@ -57,7 +57,8 @@ const int64_t OB_DAS_MAX_PACKET_SIZE = 2 * 1024 * 1024l - 8 * 1024;
  * it can be considered that the DAS request will send at most one RPC request to each zone.
  * so OB_DAS_MAX_TOTAL_PACKET_SIZE was defined as:
  */
-const int64_t OB_DAS_MAX_TOTAL_PACKET_SIZE = 3 * OB_DAS_MAX_PACKET_SIZE;
+const int64_t OB_DAS_MAX_TOTAL_PACKET_SIZE = 2 * OB_DAS_MAX_PACKET_SIZE;
+const int64_t OB_DAS_MAX_META_TENANT_PACKET_SIZE = 1 * 1024 * 1024l - 8 * 1024;
 }  // namespace das
 
 enum class ObDasTaskStatus: uint8_t
diff --git a/src/sql/engine/dml/ob_table_delete_op.cpp b/src/sql/engine/dml/ob_table_delete_op.cpp
index 952602e97..6630ccbc3 100644
--- a/src/sql/engine/dml/ob_table_delete_op.cpp
+++ b/src/sql/engine/dml/ob_table_delete_op.cpp
@@ -137,17 +137,20 @@ OB_INLINE int ObTableDeleteOp::inner_open_with_das()
 int ObTableDeleteOp::check_need_exec_single_row()
 {
   int ret = OB_SUCCESS;
-  for (int64_t i = 0; OB_SUCC(ret) && i < MY_SPEC.del_ctdefs_.count() && !execute_single_row_; ++i) {
-    const ObTableDeleteSpec::DelCtDefArray &ctdefs = MY_SPEC.del_ctdefs_.at(i);
-    const ObDelCtDef &del_ctdef = *ctdefs.at(0);
-    if (has_before_row_trigger(del_ctdef) || has_after_row_trigger(del_ctdef)) {
-      execute_single_row_ = true;
-    }
-    const ObForeignKeyArgArray &fk_args = del_ctdef.fk_args_;
-    for (int j = 0; OB_SUCC(ret) && j < fk_args.count() && !execute_single_row_; j++) {
-      if (fk_args.at(j).is_self_ref_ && fk_args.at(j).ref_action_ == ACTION_CASCADE) {
+  ret = ObTableModifyOp::check_need_exec_single_row();
+  if (OB_SUCC(ret) && !execute_single_row_) {
+    for (int64_t i = 0; OB_SUCC(ret) && i < MY_SPEC.del_ctdefs_.count() && !execute_single_row_; ++i) {
+      const ObTableDeleteSpec::DelCtDefArray &ctdefs = MY_SPEC.del_ctdefs_.at(i);
+      const ObDelCtDef &del_ctdef = *ctdefs.at(0);
+      if (has_before_row_trigger(del_ctdef) || has_after_row_trigger(del_ctdef)) {
         execute_single_row_ = true;
       }
+      const ObForeignKeyArgArray &fk_args = del_ctdef.fk_args_;
+      for (int j = 0; OB_SUCC(ret) && j < fk_args.count() && !execute_single_row_; j++) {
+        if (fk_args.at(j).is_self_ref_ && fk_args.at(j).ref_action_ == ACTION_CASCADE) {
+          execute_single_row_ = true;
+        }
+      }
     }
   }
   return ret;
diff --git a/src/sql/engine/dml/ob_table_insert_all_op.cpp b/src/sql/engine/dml/ob_table_insert_all_op.cpp
index c17c0eeb7..646039c95 100644
--- a/src/sql/engine/dml/ob_table_insert_all_op.cpp
+++ b/src/sql/engine/dml/ob_table_insert_all_op.cpp
@@ -104,21 +104,24 @@ int ObTableInsertAllOp::switch_iterator(ObExecContext &ctx)
 int ObTableInsertAllOp::check_need_exec_single_row()
 {
   int ret = OB_SUCCESS;
-  for (int64_t i = 0; OB_SUCC(ret) && i < MY_SPEC.ins_ctdefs_.count() && !execute_single_row_; ++i) {
-    const ObTableInsertSpec::InsCtDefArray &ctdefs = MY_SPEC.ins_ctdefs_.at(i);
-    const ObInsCtDef &ins_ctdef = *(ctdefs.at(0));
-    const uint64_t table_id = ins_ctdef.das_base_ctdef_.index_tid_;
-    const ObForeignKeyArgArray &fk_args = ins_ctdef.fk_args_;
-    if (has_before_row_trigger(ins_ctdef) || has_after_row_trigger(ins_ctdef)) {
-      execute_single_row_ = true;
-    }
-    for (int j = 0; OB_SUCC(ret) && j < fk_args.count() && !execute_single_row_; j++) {
-      const ObForeignKeyArg &fk_arg = fk_args.at(j);
-      const uint64_t parent_table_id = fk_arg.table_id_;
-      for (int k = 0; k < MY_SPEC.ins_ctdefs_.count() && !execute_single_row_; ++k) {
-        const uint64_t tmp_table_id =  MY_SPEC.ins_ctdefs_.at(k).at(0)->das_base_ctdef_.index_tid_;
-        if (parent_table_id == tmp_table_id && k != i) {
-          execute_single_row_ = true;
+  ret = ObTableModifyOp::check_need_exec_single_row();
+  if (OB_SUCC(ret) && !execute_single_row_) {
+    for (int64_t i = 0; OB_SUCC(ret) && i < MY_SPEC.ins_ctdefs_.count() && !execute_single_row_; ++i) {
+      const ObTableInsertSpec::InsCtDefArray &ctdefs = MY_SPEC.ins_ctdefs_.at(i);
+      const ObInsCtDef &ins_ctdef = *(ctdefs.at(0));
+      const uint64_t table_id = ins_ctdef.das_base_ctdef_.index_tid_;
+      const ObForeignKeyArgArray &fk_args = ins_ctdef.fk_args_;
+      if (has_before_row_trigger(ins_ctdef) || has_after_row_trigger(ins_ctdef)) {
+        execute_single_row_ = true;
+      }
+      for (int j = 0; OB_SUCC(ret) && j < fk_args.count() && !execute_single_row_; j++) {
+        const ObForeignKeyArg &fk_arg = fk_args.at(j);
+        const uint64_t parent_table_id = fk_arg.table_id_;
+        for (int k = 0; k < MY_SPEC.ins_ctdefs_.count() && !execute_single_row_; ++k) {
+          const uint64_t tmp_table_id =  MY_SPEC.ins_ctdefs_.at(k).at(0)->das_base_ctdef_.index_tid_;
+          if (parent_table_id == tmp_table_id && k != i) {
+            execute_single_row_ = true;
+          }
         }
       }
     }
diff --git a/src/sql/engine/dml/ob_table_insert_op.cpp b/src/sql/engine/dml/ob_table_insert_op.cpp
index 95e640ade..366ca7914 100644
--- a/src/sql/engine/dml/ob_table_insert_op.cpp
+++ b/src/sql/engine/dml/ob_table_insert_op.cpp
@@ -111,11 +111,14 @@ OB_DEF_SERIALIZE_SIZE(ObTableInsertSpec)
 int ObTableInsertOp::check_need_exec_single_row()
 {
   int ret = OB_SUCCESS;
-  for (int64_t i = 0; OB_SUCC(ret) && i < MY_SPEC.ins_ctdefs_.count() && !execute_single_row_; ++i) {
-    const ObTableInsertSpec::InsCtDefArray &ctdefs = MY_SPEC.ins_ctdefs_.at(i);
-    const ObInsCtDef &ins_ctdef = *ctdefs.at(0);
-    if (has_before_row_trigger(ins_ctdef) || has_after_row_trigger(ins_ctdef)) {
-      execute_single_row_ = true;
+  ret = ObTableModifyOp::check_need_exec_single_row();
+  if (OB_SUCC(ret) && !execute_single_row_) {
+    for (int64_t i = 0; OB_SUCC(ret) && i < MY_SPEC.ins_ctdefs_.count() && !execute_single_row_; ++i) {
+      const ObTableInsertSpec::InsCtDefArray &ctdefs = MY_SPEC.ins_ctdefs_.at(i);
+      const ObInsCtDef &ins_ctdef = *ctdefs.at(0);
+      if (has_before_row_trigger(ins_ctdef) || has_after_row_trigger(ins_ctdef)) {
+        execute_single_row_ = true;
+      }
     }
   }
   return ret;
diff --git a/src/sql/engine/dml/ob_table_insert_up_op.cpp b/src/sql/engine/dml/ob_table_insert_up_op.cpp
index e3141bebd..dd5bc1825 100644
--- a/src/sql/engine/dml/ob_table_insert_up_op.cpp
+++ b/src/sql/engine/dml/ob_table_insert_up_op.cpp
@@ -91,17 +91,20 @@ OB_DEF_SERIALIZE_SIZE(ObTableInsertUpSpec)
 int ObTableInsertUpOp::check_need_exec_single_row()
 {
   int ret = OB_SUCCESS;
-  ObInsertUpCtDef *insert_up_ctdef = MY_SPEC.insert_up_ctdefs_.at(0);
-  const ObInsCtDef *ins_ctdef = insert_up_ctdef->ins_ctdef_;
-  const ObUpdCtDef *upd_ctdef = insert_up_ctdef->upd_ctdef_;
-  if (OB_NOT_NULL(ins_ctdef) && OB_NOT_NULL(upd_ctdef)) {
-    if (has_before_row_trigger(*ins_ctdef) || has_after_row_trigger(*ins_ctdef) ||
-      has_before_row_trigger(*upd_ctdef) || has_after_row_trigger(*upd_ctdef)) {
-    execute_single_row_ = true;
+  ret = ObTableModifyOp::check_need_exec_single_row();
+  if (OB_SUCC(ret) && !execute_single_row_) {
+    ObInsertUpCtDef *insert_up_ctdef = MY_SPEC.insert_up_ctdefs_.at(0);
+    const ObInsCtDef *ins_ctdef = insert_up_ctdef->ins_ctdef_;
+    const ObUpdCtDef *upd_ctdef = insert_up_ctdef->upd_ctdef_;
+    if (OB_NOT_NULL(ins_ctdef) && OB_NOT_NULL(upd_ctdef)) {
+      if (has_before_row_trigger(*ins_ctdef) || has_after_row_trigger(*ins_ctdef) ||
+        has_before_row_trigger(*upd_ctdef) || has_after_row_trigger(*upd_ctdef)) {
+      execute_single_row_ = true;
+      }
+    } else {
+      ret = OB_ERR_UNEXPECTED;
+      LOG_WARN("ins_ctdef or upd_ctdef of primary table is nullptr", K(ret));
     }
-  } else {
-    ret = OB_ERR_UNEXPECTED;
-    LOG_WARN("ins_ctdef or upd_ctdef of primary table is nullptr", K(ret));
   }
   return ret;
 }
diff --git a/src/sql/engine/dml/ob_table_merge_op.cpp b/src/sql/engine/dml/ob_table_merge_op.cpp
index a88152392..b87a92471 100644
--- a/src/sql/engine/dml/ob_table_merge_op.cpp
+++ b/src/sql/engine/dml/ob_table_merge_op.cpp
@@ -156,25 +156,28 @@ ObTableMergeOp::ObTableMergeOp(ObExecContext &ctx, const ObOpSpec &spec, ObOpInp
 int ObTableMergeOp::check_need_exec_single_row()
 {
   int ret = OB_SUCCESS;
-  ObMergeCtDef *merge_ctdef = MY_SPEC.merge_ctdefs_.at(0);
-  if (!execute_single_row_ && OB_NOT_NULL(merge_ctdef->ins_ctdef_)) {
-    const ObInsCtDef &ins_ctdef = *merge_ctdef->ins_ctdef_;
-    if (has_before_row_trigger(ins_ctdef) || has_after_row_trigger(ins_ctdef)) {
-      execute_single_row_ = true;
+  ret = ObTableModifyOp::check_need_exec_single_row();
+  if (OB_SUCC(ret) && !execute_single_row_) {
+    ObMergeCtDef *merge_ctdef = MY_SPEC.merge_ctdefs_.at(0);
+    if (!execute_single_row_ && OB_NOT_NULL(merge_ctdef->ins_ctdef_)) {
+      const ObInsCtDef &ins_ctdef = *merge_ctdef->ins_ctdef_;
+      if (has_before_row_trigger(ins_ctdef) || has_after_row_trigger(ins_ctdef)) {
+        execute_single_row_ = true;
+      }
     }
-  }
 
-  if (!execute_single_row_ && OB_NOT_NULL(merge_ctdef->upd_ctdef_)) {
-    const ObUpdCtDef &upd_ctdef = *merge_ctdef->upd_ctdef_;
-    if (has_before_row_trigger(upd_ctdef) || has_after_row_trigger(upd_ctdef)) {
-      execute_single_row_ = true;
+    if (!execute_single_row_ && OB_NOT_NULL(merge_ctdef->upd_ctdef_)) {
+      const ObUpdCtDef &upd_ctdef = *merge_ctdef->upd_ctdef_;
+      if (has_before_row_trigger(upd_ctdef) || has_after_row_trigger(upd_ctdef)) {
+        execute_single_row_ = true;
+      }
     }
-  }
 
-  if (!execute_single_row_ && OB_NOT_NULL(merge_ctdef->del_ctdef_)) {
-    const ObDelCtDef &del_ctdef = *merge_ctdef->del_ctdef_;
-    if (has_before_row_trigger(del_ctdef) || has_after_row_trigger(del_ctdef)) {
-      execute_single_row_ = true;
+    if (!execute_single_row_ && OB_NOT_NULL(merge_ctdef->del_ctdef_)) {
+      const ObDelCtDef &del_ctdef = *merge_ctdef->del_ctdef_;
+      if (has_before_row_trigger(del_ctdef) || has_after_row_trigger(del_ctdef)) {
+        execute_single_row_ = true;
+      }
     }
   }
   return ret;
diff --git a/src/sql/engine/dml/ob_table_modify_op.cpp b/src/sql/engine/dml/ob_table_modify_op.cpp
index 8caf6c048..6908e2ca4 100644
--- a/src/sql/engine/dml/ob_table_modify_op.cpp
+++ b/src/sql/engine/dml/ob_table_modify_op.cpp
@@ -758,7 +758,9 @@ int ObTableModifyOp::inner_rescan()
 
 int ObTableModifyOp::check_need_exec_single_row() {
   int ret = OB_SUCCESS;
-  execute_single_row_ = false;
+  if (MY_SPEC.is_returning_ && need_foreign_key_checks()) {
+    execute_single_row_ = true;
+  }
   return ret;
 }
 
@@ -1099,9 +1101,16 @@ int ObTableModifyOp::submit_all_dml_task()
 int ObTableModifyOp::discharge_das_write_buffer()
 {
   int ret = OB_SUCCESS;
-  if (dml_rtctx_.get_cached_row_size() >= das::OB_DAS_MAX_TOTAL_PACKET_SIZE || execute_single_row_) {
-    LOG_INFO("DASWriteBuffer full or need single row execution, now to write storage",
-             "buffer memory", dml_rtctx_.das_ref_.get_das_alloc().used(), K(execute_single_row_), K(dml_rtctx_.get_cached_row_size()));
+  int64_t simulate_buffer_size = - EVENT_CALL(EventTable::EN_DAS_DML_BUFFER_OVERFLOW);
+  int64_t buffer_size_limit = is_meta_tenant(tenant_id_) ? das::OB_DAS_MAX_META_TENANT_PACKET_SIZE : das::OB_DAS_MAX_TOTAL_PACKET_SIZE;
+  if (OB_UNLIKELY(simulate_buffer_size > 0)) {
+    buffer_size_limit = simulate_buffer_size;
+  }
+  if (dml_rtctx_.get_cached_row_size() >= buffer_size_limit) {
+    LOG_INFO("DASWriteBuffer full, now to write storage",
+             "buffer memory", dml_rtctx_.das_ref_.get_das_alloc().used(), K(dml_rtctx_.get_cached_row_size()));
+    ret = submit_all_dml_task();
+  } else if (execute_single_row_) {
     ret = submit_all_dml_task();
   }
   return ret;
diff --git a/src/sql/engine/dml/ob_table_replace_op.cpp b/src/sql/engine/dml/ob_table_replace_op.cpp
index 0c7916c63..8a617c91d 100644
--- a/src/sql/engine/dml/ob_table_replace_op.cpp
+++ b/src/sql/engine/dml/ob_table_replace_op.cpp
@@ -97,17 +97,20 @@ OB_DEF_SERIALIZE_SIZE(ObTableReplaceSpec)
 int ObTableReplaceOp::check_need_exec_single_row()
 {
   int ret = OB_SUCCESS;
-  ObReplaceCtDef *replace_ctdef = MY_SPEC.replace_ctdefs_.at(0);
-  const ObInsCtDef *ins_ctdef = replace_ctdef->ins_ctdef_;
-  const ObDelCtDef *del_ctdef = replace_ctdef->del_ctdef_;
-  if (OB_NOT_NULL(ins_ctdef) || OB_NOT_NULL(del_ctdef)) {
-    if (has_before_row_trigger(*ins_ctdef) || has_after_row_trigger(*ins_ctdef)
-        || has_before_row_trigger(*del_ctdef) || has_after_row_trigger(*del_ctdef)) {
-      execute_single_row_ = true;
+  ret = ObTableModifyOp::check_need_exec_single_row();
+  if (OB_SUCC(ret) && !execute_single_row_) {
+    ObReplaceCtDef *replace_ctdef = MY_SPEC.replace_ctdefs_.at(0);
+    const ObInsCtDef *ins_ctdef = replace_ctdef->ins_ctdef_;
+    const ObDelCtDef *del_ctdef = replace_ctdef->del_ctdef_;
+    if (OB_NOT_NULL(ins_ctdef) || OB_NOT_NULL(del_ctdef)) {
+      if (has_before_row_trigger(*ins_ctdef) || has_after_row_trigger(*ins_ctdef)
+          || has_before_row_trigger(*del_ctdef) || has_after_row_trigger(*del_ctdef)) {
+        execute_single_row_ = true;
+      }
+    } else {
+      ret = OB_ERR_UNEXPECTED;
+      LOG_WARN("ins_ctdef or del_ctdef of primary table is nullptr", K(ret));
     }
-  } else {
-    ret = OB_ERR_UNEXPECTED;
-    LOG_WARN("ins_ctdef or del_ctdef of primary table is nullptr", K(ret));
   }
   return ret;
 }
diff --git a/src/sql/engine/dml/ob_table_update_op.cpp b/src/sql/engine/dml/ob_table_update_op.cpp
index d4323a768..a700d46a6 100644
--- a/src/sql/engine/dml/ob_table_update_op.cpp
+++ b/src/sql/engine/dml/ob_table_update_op.cpp
@@ -116,11 +116,14 @@ ObTableUpdateOp::ObTableUpdateOp(ObExecContext &exec_ctx, const ObOpSpec &spec,
 int ObTableUpdateOp::check_need_exec_single_row()
 {
   int ret = OB_SUCCESS;
-  for (int64_t i = 0; OB_SUCC(ret) && i < MY_SPEC.upd_ctdefs_.count() && !execute_single_row_; ++i) {
-    const ObTableUpdateSpec::UpdCtDefArray &ctdefs = MY_SPEC.upd_ctdefs_.at(i);
-    const ObUpdCtDef &upd_ctdef = *ctdefs.at(0);
-    if (has_before_row_trigger(upd_ctdef) || has_after_row_trigger(upd_ctdef)) {
-      execute_single_row_ = true;
+  ret = ObTableModifyOp::check_need_exec_single_row();
+  if (OB_SUCC(ret) && !execute_single_row_) {
+    for (int64_t i = 0; OB_SUCC(ret) && i < MY_SPEC.upd_ctdefs_.count() && !execute_single_row_; ++i) {
+      const ObTableUpdateSpec::UpdCtDefArray &ctdefs = MY_SPEC.upd_ctdefs_.at(i);
+      const ObUpdCtDef &upd_ctdef = *ctdefs.at(0);
+      if (has_before_row_trigger(upd_ctdef) || has_after_row_trigger(upd_ctdef)) {
+        execute_single_row_ = true;
+      }
     }
   }
   return ret;