diff --git a/src/db/db.rs b/src/db/db.rs
index 887ebe92e1218bd8557195ab9f44c639fb1399a2..b704f46f3a14586295dc6c40e5835851196f0a99 100644
--- a/src/db/db.rs
+++ b/src/db/db.rs
@@ -336,7 +336,11 @@ impl DbPool {
             Ok(DbPool::Pg(pool))
         } else {
             let manager = ConnectionManager::<SqliteConnection>::new(database_url);
-            let pool = Pool::builder().build(manager)?;
+            let pool = Pool::builder()
+                .max_size(5)
+                .connection_customizer(Box::new(WalModeEnabler))
+                .connection_timeout(std::time::Duration::from_secs(60))
+                .build(manager)?;
             // 运行迁移
             let mut conn = pool.get()?;
             conn.run_pending_migrations(MIGRATIONS).unwrap();
@@ -345,3 +349,20 @@ impl DbPool {
         }
     }
 }
+
+#[derive(Debug)]
+struct WalModeEnabler;
+
+impl diesel::r2d2::CustomizeConnection<SqliteConnection, diesel::r2d2::Error> for WalModeEnabler {
+    fn on_acquire(&self, conn: &mut SqliteConnection) -> Result<(), diesel::r2d2::Error> {
+        // 开启 WAL 模式
+        diesel::sql_query("PRAGMA journal_mode = WAL;")
+            .execute(conn)
+            .map_err(diesel::r2d2::Error::QueryError)?;
+        // 可选：设置 busy_timeout，避免立即返回 locked 错误
+        diesel::sql_query("PRAGMA busy_timeout = 1000;")
+            .execute(conn)
+            .map_err(diesel::r2d2::Error::QueryError)?;
+        Ok(())
+    }
+}