全项目数据库性能优化

apps/backend/src/db/client.ts

@@ -11,6 +11,9 @@ export function getDb(): Pool {
       connectionString: String(runtimeConfig.database?.url || '').trim(),
       ssl: runtimeConfig.database?.ssl ? { rejectUnauthorized: false } : false,
       max: Number(runtimeConfig.database?.maxConnections || 10),
+      idleTimeoutMillis: Number(runtimeConfig.database?.idleTimeoutMs || 30_000),
+      connectionTimeoutMillis: Number(runtimeConfig.database?.connectionTimeoutMs || 5_000),
+      statement_timeout: Number(runtimeConfig.database?.statementTimeoutMs || 15_000),
     })
   }
 

apps/backend/src/db/migrations/048_database_performance_guards.sql

@@ -0,0 +1,13 @@
+-- 高频打手订单、拼单统计、快手回调扫描和仪表盘查询的索引保护。
+CREATE INDEX IF NOT EXISTS idx_work_order_shares_order_status_include_quantity
+  ON work_order_shares(work_order_id, status) INCLUDE (quantity);
+
+CREATE INDEX IF NOT EXISTS idx_work_order_events_order_type
+  ON work_order_events(work_order_id, event_type);
+
+CREATE INDEX IF NOT EXISTS idx_fulfillment_tasks_status_updated_at
+  ON fulfillment_tasks(task_status, updated_at DESC);
+
+CREATE INDEX IF NOT EXISTS idx_kuaishou_industry_vouchers_callback_retry_order
+  ON kuaishou_industry_vouchers(COALESCE(send_callback_sent_at, created_at), id)
+  WHERE send_callback_status <> 'success';