diff --git a/internal/caches/list_file.go b/internal/caches/list_file.go
index 490ea4c..7713eee 100644
--- a/internal/caches/list_file.go
+++ b/internal/caches/list_file.go
@@ -82,7 +82,7 @@ func (this *FileList) Init() error {
 	}
 	var dbPath = dir + "/index.db"
 	remotelogs.Println("CACHE", "loading database '"+dbPath+"'")
-	db, err := sql.Open("sqlite3", "file:"+dbPath+"?cache=shared&mode=rwc&_journal_mode=WAL&_cache_size=16000")
+	db, err := sql.Open("sqlite3", "file:"+dbPath+"?cache=shared&mode=rwc&_journal_mode=WAL&_sync=OFF&_cache_size=16000")
 	if err != nil {
 		return errors.New("open database failed: " + err.Error())
 	}
diff --git a/internal/iplibrary/ip_list_db.go b/internal/iplibrary/ip_list_db.go
index a223a98..4e1e7e9 100644
--- a/internal/iplibrary/ip_list_db.go
+++ b/internal/iplibrary/ip_list_db.go
@@ -51,7 +51,7 @@ func (this *IPListDB) init() error {
 		remotelogs.Println("CACHE", "create cache dir '"+this.dir+"'")
 	}
 
-	db, err := sql.Open("sqlite3", "file:"+this.dir+"/ip_list.db?cache=shared&mode=rwc&_journal_mode=WAL")
+	db, err := sql.Open("sqlite3", "file:"+this.dir+"/ip_list.db?cache=shared&mode=rwc&_journal_mode=WAL&_sync=OFF")
 	if err != nil {
 		return err
 	}
diff --git a/internal/metrics/task.go b/internal/metrics/task.go
index 6038856..cae75c8 100644
--- a/internal/metrics/task.go
+++ b/internal/metrics/task.go
@@ -88,7 +88,7 @@ func (this *Task) Init() error {
 		remotelogs.Println("METRIC", "create data dir '"+dir+"'")
 	}
 
-	db, err := sql.Open("sqlite3", "file:"+dir+"/metric."+strconv.FormatInt(this.item.Id, 10)+".db?cache=shared&mode=rwc&_journal_mode=WAL")
+	db, err := sql.Open("sqlite3", "file:"+dir+"/metric."+strconv.FormatInt(this.item.Id, 10)+".db?cache=shared&mode=rwc&_journal_mode=WAL&_sync=OFF")
 	if err != nil {
 		return err
 	}