executor: do not track membuffer's memory in executor (#53985)

close #53984

Author: ekexium

pkg/executor/delete.go

@@ -156,11 +156,6 @@ func (e *DeleteExec) deleteSingleTableByChunk(ctx context.Context) error {
 }
 
 func (e *DeleteExec) doBatchDelete(ctx context.Context) error {
-	txn, err := e.Ctx().Txn(false)
-	if err != nil {
-		return exeerrors.ErrBatchInsertFail.GenWithStack("BatchDelete failed with error: %v", err)
-	}
-	e.memTracker.Consume(-int64(txn.Size()))
 	e.Ctx().StmtCommit(ctx)
 	if err := sessiontxn.NewTxnInStmt(ctx, e.Ctx()); err != nil {
 		// We should return a special error for batch insert.

pkg/executor/insert_common.go

@@ -521,11 +521,6 @@ func insertRowsFromSelect(ctx context.Context, base insertCommon) error {
 }
 
 func (e *InsertValues) doBatchInsert(ctx context.Context) error {
-	txn, err := e.Ctx().Txn(false)
-	if err != nil {
-		return exeerrors.ErrBatchInsertFail.GenWithStack("BatchInsert failed with error: %v", err)
-	}
-	e.memTracker.Consume(-int64(txn.Size()))
 	e.Ctx().StmtCommit(ctx)
 	if err := sessiontxn.NewTxnInStmt(ctx, e.Ctx()); err != nil {
 		// We should return a special error for batch insert.

pkg/executor/replace.go

@@ -161,7 +161,6 @@ func (e *ReplaceExec) exec(ctx context.Context, newRows [][]types.Datum) error {
 	if err != nil {
 		return err
 	}
-	txnSize := txn.Size()
 
 	if e.collectRuntimeStatsEnabled() {
 		if snapshot := txn.GetSnapshot(); snapshot != nil {
@@ -187,7 +186,6 @@ func (e *ReplaceExec) exec(ctx context.Context, newRows [][]types.Datum) error {
 			return err
 		}
 	}
-	e.memTracker.Consume(int64(txn.Size() - txnSize))
 	return txn.MayFlush()
 }