diff --git a/internal/locate/region_request.go b/internal/locate/region_request.go
index ebdfd7da50..75139f5f45 100644
--- a/internal/locate/region_request.go
+++ b/internal/locate/region_request.go
@@ -47,7 +47,6 @@ import (
 	"time"
 	"unsafe"
 
-	"github.com/tikv/client-go/v2/oracle"
 	"go.uber.org/zap"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
@@ -64,6 +63,7 @@ import (
 	"github.com/tikv/client-go/v2/internal/logutil"
 	"github.com/tikv/client-go/v2/kv"
 	"github.com/tikv/client-go/v2/metrics"
+	"github.com/tikv/client-go/v2/oracle"
 	"github.com/tikv/client-go/v2/tikvrpc"
 	"github.com/tikv/client-go/v2/util"
 	"github.com/tikv/pd/client/errs"
diff --git a/txnkv/transaction/pipelined_flush.go b/txnkv/transaction/pipelined_flush.go
index 656321f734..4a61578b5f 100644
--- a/txnkv/transaction/pipelined_flush.go
+++ b/txnkv/transaction/pipelined_flush.go
@@ -459,6 +459,7 @@ func (c *twoPhaseCommitter) resolveFlushedLocks(bo *retry.Backoffer, start, end
 		handler,
 	)
 	runner.SetStatLogInterval(30 * time.Second)
+	runner.SetRegionsPerTask(1)
 
 	go func() {
 		if err = runner.RunOnRange(bo.GetCtx(), start, end); err != nil {