diff --git a/src/db.rs b/src/db.rs
index c55c2b1..e4f2b43 100644
--- a/src/db.rs
+++ b/src/db.rs
@@ -10,7 +10,7 @@
 use anyhow::{Context, Result};
 use rusqlite::Connection;
 
-pub const SCHEMA_VERSION: i64 = 10;
+pub const SCHEMA_VERSION: i64 = 12;
 
 /// 打开（或创建）数据库并执行幂等迁移（生产标准：空库只建表，不种任何假数据）
 pub fn open(path: &str) -> Result<Connection> {
@@ -21,6 +21,14 @@ pub fn open(path: &str) -> Result<Connection> {
         }
     }
     let conn = Connection::open(path).with_context(|| format!("打开数据库失败: {}", path))?;
+    // v12（rant 2026-08-25T12:02:13）：NFS 库性能——64MB 页缓存 + 64MB mmap 预读，
+    // 整库常驻进程内存，远端存储只首读一次（默认 cache_size 2MB < 库体积 → 每次查询准冷读）。
+    // 注意：不要启用 WAL 模式（SQLite 官方明确不支持网络文件系统，有损坏风险）；
+    // 数据库不能移本地盘（部署硬约束，库必须留在 NAS）。
+    conn.pragma_update(None, "cache_size", -65536)
+        .with_context(|| "设置 PRAGMA cache_size 失败".to_string())?;
+    conn.pragma_update(None, "mmap_size", 67108864)
+        .with_context(|| "设置 PRAGMA mmap_size 失败".to_string())?;
     migrate(&conn)?;
     Ok(conn)
 }
@@ -298,6 +306,14 @@ pub fn migrate(conn: &Connection) -> Result<()> {
     // transactions 补 api_key_id（分发 key 关联字段，Key 列显示 api_keys.name；
     // 历史行无此字段 → NULL，前端兜底走 key_label / 交易类型说明）
     ensure_column(conn, "transactions", "api_key_id", "api_key_id INTEGER")?;
+    // v12（rant 2026-08-25T12:02:13）：transactions 查询性能——summary/COUNT/list 原先
+    // 全表扫描 + 3 LEFT JOIN（dev 库 23079 行）；建 (user_id) 前缀复合索引覆盖筛选/排序/翻页/时间范围
+    conn.execute_batch(
+        "CREATE INDEX IF NOT EXISTS idx_transactions_user_id ON transactions(user_id);
+         CREATE INDEX IF NOT EXISTS idx_transactions_user_id_id ON transactions(user_id, id DESC);
+         CREATE INDEX IF NOT EXISTS idx_transactions_user_id_time ON transactions(user_id, time);
+         CREATE INDEX IF NOT EXISTS idx_transactions_user_id_type ON transactions(user_id, type);",
+    )?;
     // schema_version：INSERT OR REPLACE 保证幂等
     let v: i64 = conn
         .query_row("SELECT version FROM schema_version", [], |r| r.get(0))
@@ -561,6 +577,34 @@ mod tests {
         let _ = std::fs::remove_file(p);
     }
 
+    #[test]
+    fn transactions_perf_indexes_created_on_migrate() {
+        // v12（rant 2026-08-25T12:02:13）：transactions 性能索引在迁移时建好
+        //（summary/COUNT/list 原先全表扫描 + 3 LEFT JOIN，dev 库 23079 行）
+        let (conn, p) = tmp_db("txidx");
+        let names: Vec<String> = conn
+            .prepare(
+                "SELECT name FROM sqlite_master WHERE type = 'index' AND name LIKE 'idx_transactions_%' ORDER BY name",
+            )
+            .unwrap()
+            .query_map([], |r| r.get(0))
+            .unwrap()
+            .collect::<rusqlite::Result<Vec<_>>>()
+            .unwrap();
+        assert_eq!(
+            names,
+            vec![
+                "idx_transactions_user_id",
+                "idx_transactions_user_id_id",
+                "idx_transactions_user_id_time",
+                "idx_transactions_user_id_type",
+            ],
+            "四个性能索引都应建好"
+        );
+        drop(conn);
+        let _ = std::fs::remove_file(p);
+    }
+
     #[test]
     fn empty_db_has_no_seeded_users() {
         // rant 2026-08-19T10:41:03：生产标准空库——migrate 后无任何种子用户/配额/占位 key
diff --git a/ui/index.html b/ui/index.html
index 6e32d1e..542e5ff 100644
--- a/ui/index.html
+++ b/ui/index.html
@@ -5,7 +5,7 @@
 <meta name="viewport" content="width=device-width, initial-scale=1.0">
 <title>AITokenPool</title>
 <link rel="icon" type="image/svg+xml" href="data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 64 64'%3E%3Cdefs%3E%3ClinearGradient id='g' x1='0' y1='0' x2='1' y2='1'%3E%3Cstop offset='0' stop-color='%234ecdc4'/%3E%3Cstop offset='1' stop-color='%232a9d8f'/%3E%3C/linearGradient%3E%3C/defs%3E%3Crect width='64' height='64' rx='14' fill='url(%23g)'/%3E%3Ctext x='32' y='43' font-family='-apple-system,Segoe UI,Arial,sans-serif' font-size='30' font-weight='800' text-anchor='middle' fill='%23062021'%3EAT%3C/text%3E%3C/svg%3E">
-<link rel="stylesheet" href="css/style.css?v=20260825-3">
+<link rel="stylesheet" href="css/style.css?v=20260825-4">
 </head>
 <body>
 
@@ -683,9 +683,9 @@ <h3 id="chat-title">使用模型</h3>
   </div>
 </div>
 
-<script src="js/api.js?v=20260825-3"></script>
-<script src="js/data.js?v=20260825-3"></script>
-<script src="js/i18n.js?v=20260825-3"></script>
-<script src="js/app.js?v=20260825-3"></script>
+<script src="js/api.js?v=20260825-4"></script>
+<script src="js/data.js?v=20260825-4"></script>
+<script src="js/i18n.js?v=20260825-4"></script>
+<script src="js/app.js?v=20260825-4"></script>
 </body>
 </html>
diff --git a/ui/js/app.js b/ui/js/app.js
index 4724a48..2a295ed 100644
--- a/ui/js/app.js
+++ b/ui/js/app.js
@@ -1469,18 +1469,21 @@
     const page = Math.max(1, txTable.page || 1);
     const pageSize = Math.min(100, Math.max(1, txTable.pageSize || 10));
     const q = "/api/transactions?type=" + type + "&page=" + page + "&page_size=" + pageSize + (range ? "&" + range : "") + (cols ? "&" + cols : "");
+    // 趋势图数据（rant 2026-08-23T16:01:07 需求 2）：同列筛选口径
+    const bucket = txTrendBucket();
+    const tq = "/api/transactions/trend?type=" + type + "&bucket=" + bucket + (range ? "&" + range : "") + (cols ? "&" + cols : "");
     try {
-      await liveLoad("transactions", q);
+      // rant 2026-08-25T12:02:13：列表与趋势并行拉取（页面加载不再串行多等一个 ~0.9s 请求）；
+      // 失败互不阻塞：列表失败降级空态，趋势失败仅 trend=null
+      const [, trend] = await Promise.all([
+        liveLoad("transactions", q).catch(() => { Live.transactions = null; return null; }),
+        api.get(tq).catch(() => null),
+      ]);
+      if (Live.transactions) Live.transactions.trend = trend;
       txTable.loadedPage = page;
       txTable.loadedPageSize = pageSize;
       txTable.loadedFilterSig = txFilterSig(); // 记录已加载的筛选条件，变化时 renderTransactions 重拉
     } catch (e) { Live.transactions = null; /* 登录态降级空态 */ }
-    // 趋势图数据（rant 2026-08-23T16:01:07 需求 2）：独立拉取，失败不阻塞列表；同列筛选口径
-    const bucket = txTrendBucket();
-    try {
-      const trend = await api.get("/api/transactions/trend?type=" + type + "&bucket=" + bucket + (range ? "&" + range : "") + (cols ? "&" + cols : ""));
-      if (Live.transactions) Live.transactions.trend = trend;
-    } catch (e) { if (Live.transactions) Live.transactions.trend = null; }
     renderTransactions();
     // 翻页后滚动到列表顶部（rant 2026-08-24T10:51:57 需求 4）
     if (page > 1) {