diff --git a/internal/caches/list_file.go b/internal/caches/list_file.go
index d01c148..9ff2dd7 100644
--- a/internal/caches/list_file.go
+++ b/internal/caches/list_file.go
@@ -458,7 +458,7 @@ func (this *FileList) UpgradeV3(oldDir string, brokenOnError bool) error {
 		remotelogs.Println("CACHE", "upgrading local database finished")
 	}()
 
-	db, err := dbs.OpenWriter("file:" + indexDBPath + "?cache=shared&mode=rwc&_journal_mode=WAL&_sync=NORMAL&_locking_mode=EXCLUSIVE")
+	db, err := dbs.OpenWriter("file:" + indexDBPath + "?cache=shared&mode=rwc&_journal_mode=WAL&_sync=" + dbs.SyncMode + "&_locking_mode=EXCLUSIVE")
 	if err != nil {
 		return err
 	}
diff --git a/internal/caches/list_file_db.go b/internal/caches/list_file_db.go
index 06fd312..d796d42 100644
--- a/internal/caches/list_file_db.go
+++ b/internal/caches/list_file_db.go
@@ -73,7 +73,7 @@ func (this *FileListDB) Open(dbPath string) error {
 
 	// write db
 	// 这里不能加 EXCLUSIVE 锁，不然异步事务可能会失败
-	writeDB, err := dbs.OpenWriter("file:" + dbPath + "?cache=private&mode=rwc&_journal_mode=WAL&_sync=NORMAL&_cache_size=" + types.String(cacheSize) + "&_secure_delete=FAST")
+	writeDB, err := dbs.OpenWriter("file:" + dbPath + "?cache=private&mode=rwc&_journal_mode=WAL&_sync=" + dbs.SyncMode + "&_cache_size=" + types.String(cacheSize) + "&_secure_delete=FAST")
 	if err != nil {
 		return fmt.Errorf("open write database failed: %w", err)
 	}
diff --git a/internal/iplibrary/ip_list_db.go b/internal/iplibrary/ip_list_db.go
index e9f4d36..6fae4fe 100644
--- a/internal/iplibrary/ip_list_db.go
+++ b/internal/iplibrary/ip_list_db.go
@@ -60,7 +60,7 @@ func (this *IPListDB) init() error {
 
 	var path = this.dir + "/ip_list.db"
 
-	db, err := dbs.OpenWriter("file:" + path + "?cache=shared&mode=rwc&_journal_mode=WAL&_sync=NORMAL&_locking_mode=EXCLUSIVE")
+	db, err := dbs.OpenWriter("file:" + path + "?cache=shared&mode=rwc&_journal_mode=WAL&_sync=" + dbs.SyncMode + "&_locking_mode=EXCLUSIVE")
 	if err != nil {
 		return err
 	}
diff --git a/internal/metrics/task.go b/internal/metrics/task.go
index 087276c..a872ab7 100644
--- a/internal/metrics/task.go
+++ b/internal/metrics/task.go
@@ -91,7 +91,7 @@ func (this *Task) Init() error {
 
 	var path = dir + "/metric." + types.String(this.item.Id) + ".db"
 
-	db, err := dbs.OpenWriter("file:" + path + "?cache=shared&mode=rwc&_journal_mode=WAL&_sync=NORMAL&_locking_mode=EXCLUSIVE")
+	db, err := dbs.OpenWriter("file:" + path + "?cache=shared&mode=rwc&_journal_mode=WAL&_sync=" + dbs.SyncMode + "&_locking_mode=EXCLUSIVE")
 	if err != nil {
 		return err
 	}
diff --git a/internal/utils/dbs/db.go b/internal/utils/dbs/db.go
index f3f988c..67b1401 100644
--- a/internal/utils/dbs/db.go
+++ b/internal/utils/dbs/db.go
@@ -18,6 +18,10 @@ import (
 	"time"
 )
 
+const (
+	SyncMode = "NORMAL"
+)
+
 var errDBIsClosed = errors.New("the database is closed")
 
 type DB struct {
@@ -199,6 +203,7 @@ func (this *DB) Close() error {
 	this.statusLocker.Unlock()
 
 	// waiting for updating operations to finish
+	var maxLoops = 5_000
 	for {
 		this.statusLocker.Lock()
 		var countUpdating = this.countUpdating
@@ -207,6 +212,11 @@ func (this *DB) Close() error {
 			break
 		}
 		time.Sleep(1 * time.Millisecond)
+
+		maxLoops--
+		if maxLoops <= 0 {
+			break
+		}
 	}
 
 	for _, batch := range this.batches {
diff --git a/internal/utils/dbs/db_test.go b/internal/utils/dbs/db_test.go
index b5de615..c88791d 100644
--- a/internal/utils/dbs/db_test.go
+++ b/internal/utils/dbs/db_test.go
@@ -3,12 +3,13 @@
 package dbs_test
 
 import (
+	"github.com/TeaOSLab/EdgeNode/internal/utils/dbs"
 	"net/url"
 	"testing"
 )
 
 func TestParseDSN(t *testing.T) {
-	var dsn = "file:/home/cache/p43/.indexes/db-3.db?cache=private&mode=ro&_journal_mode=WAL&_sync=NORMAL&_cache_size=88000"
+	var dsn = "file:/home/cache/p43/.indexes/db-3.db?cache=private&mode=ro&_journal_mode=WAL&_sync=" + dbs.SyncMode + "&_cache_size=88000"
 	u, err := url.Parse(dsn)
 	if err != nil {
 		t.Fatal(err)
diff --git a/internal/utils/dbs/stmt.go b/internal/utils/dbs/stmt.go
index 7c34ff2..fa1ab7a 100644
--- a/internal/utils/dbs/stmt.go
+++ b/internal/utils/dbs/stmt.go
@@ -5,6 +5,7 @@ package dbs
 import (
 	"context"
 	"database/sql"
+	fsutils "github.com/TeaOSLab/EdgeNode/internal/utils/fs"
 )
 
 type Stmt struct {
@@ -27,7 +28,7 @@ func (this *Stmt) EnableStat() {
 	this.enableStat = true
 }
 
-func (this *Stmt) ExecContext(ctx context.Context, args ...any) (sql.Result, error) {
+func (this *Stmt) ExecContext(ctx context.Context, args ...any) (result sql.Result, err error) {
 	// check database status
 	if this.db.BeginUpdating() {
 		defer this.db.EndUpdating()
@@ -38,10 +39,13 @@ func (this *Stmt) ExecContext(ctx context.Context, args ...any) (sql.Result, err
 	if this.enableStat {
 		defer SharedQueryStatManager.AddQuery(this.query).End()
 	}
-	return this.rawStmt.ExecContext(ctx, args...)
+	fsutils.WriteBegin()
+	result, err = this.rawStmt.ExecContext(ctx, args...)
+	fsutils.WriteEnd()
+	return
 }
 
-func (this *Stmt) Exec(args ...any) (sql.Result, error) {
+func (this *Stmt) Exec(args ...any) (result sql.Result, err error) {
 	// check database status
 	if this.db.BeginUpdating() {
 		defer this.db.EndUpdating()
@@ -52,7 +56,11 @@ func (this *Stmt) Exec(args ...any) (sql.Result, error) {
 	if this.enableStat {
 		defer SharedQueryStatManager.AddQuery(this.query).End()
 	}
-	return this.rawStmt.Exec(args...)
+
+	fsutils.WriteBegin()
+	result, err = this.rawStmt.Exec(args...)
+	fsutils.WriteEnd()
+	return
 }
 
 func (this *Stmt) QueryContext(ctx context.Context, args ...any) (*sql.Rows, error) {