diff --git a/backend/storage/preferences.go b/backend/storage/preferences.go
index f215c317..67783435 100644
--- a/backend/storage/preferences.go
+++ b/backend/storage/preferences.go
@@ -46,7 +46,9 @@ func (p *PreferencesStorage) GetPreferences() (ret types.Preferences) {
 	defer p.mutex.Unlock()
 
 	ret = p.getPreferences()
-	ret.General.ScanSize = max(ret.General.ScanSize, consts.DEFAULT_SCAN_SIZE)
+	if ret.General.ScanSize <= 0 {
+		ret.General.ScanSize = consts.DEFAULT_SCAN_SIZE
+	}
 	ret.Behavior.AsideWidth = max(ret.Behavior.AsideWidth, consts.DEFAULT_ASIDE_WIDTH)
 	ret.Behavior.WindowWidth = max(ret.Behavior.WindowWidth, consts.MIN_WINDOW_WIDTH)
 	ret.Behavior.WindowHeight = max(ret.Behavior.WindowHeight, consts.MIN_WINDOW_HEIGHT)
diff --git a/frontend/src/components/sidebar/BrowserTree.vue b/frontend/src/components/sidebar/BrowserTree.vue
index 45b53393..0452ea16 100644
--- a/frontend/src/components/sidebar/BrowserTree.vue
+++ b/frontend/src/components/sidebar/BrowserTree.vue
@@ -259,6 +259,9 @@ const handleSelectContextMenu = (key) => {
             resetExpandKey(props.server, db, true)
             connectionStore.closeDatabase(props.server, db)
             break
+        case 'db_flush':
+            dialogStore.openDeleteKeyDialog(props.server, db, '*')
+            break
         case 'db_newkey':
         case 'key_newkey':
             dialogStore.openNewKeyDialog(redisKey, props.server, db)
@@ -548,7 +551,7 @@ const getDatabaseMenu = (opened, loading, end) => {
                 tTooltip: 'interface.batch_delete',
                 icon: Delete,
                 disabled: loading === true,
-                onClick: () => handleSelectContextMenu('key_remove'),
+                onClick: () => handleSelectContextMenu('db_flush'),
             }),
             // h(IconButton, {
             //     tTooltip: 'interface.more_action',