add: 服务器卡顿诊断脚本 profile-server-lag 与 fix-db-latency

Co-authored-by: Cursor <cursoragent@cursor.com>

deploy/fix-db-latency.sh

@@ -0,0 +1,77 @@
+#!/bin/bash
+# 诊断并修复 API 延迟：对比本机 Docker MySQL vs 远程 gvsds.com
+# 在服务器上执行：bash deploy/fix-db-latency.sh
+
+set -e
+DJANGO_DIR="/opt/1panel/apps/openresty/nginx/www/sites/43.142.166.152.443/django"
+cd "$DJANGO_DIR"
+
+echo "========== 1. Gunicorn 状态 =========="
+systemctl is-active gunicorn-dianjing.service || true
+pgrep -af 'gunicorn.*a_long_dianjing' || echo "无 gunicorn 进程！"
+
+echo ""
+echo "========== 2. 当前数据库配置 =========="
+python3 - <<'PY'
+import app_secrets
+print(f"HOST={app_secrets.DATABASE_HOST} PORT={app_secrets.DATABASE_PORT} DB={app_secrets.DATABASE_NAME}")
+PY
+
+echo ""
+echo "========== 3. 连接延迟对比（新建连接 + 简单查询）=========="
+python3 - <<'PY'
+import time
+import pymysql
+import app_secrets
+
+def test_host(host, port, user, password, db):
+    t0 = time.time()
+    try:
+        conn = pymysql.connect(
+            host=host, port=int(port), user=user, password=password,
+            database=db, connect_timeout=5, charset='utf8mb4',
+        )
+        connect_ms = (time.time() - t0) * 1000
+        t1 = time.time()
+        with conn.cursor() as cur:
+            cur.execute("SELECT 1")
+            cur.fetchone()
+        query_ms = (time.time() - t1) * 1000
+        conn.close()
+        return connect_ms, query_ms, None
+    except Exception as e:
+        return None, None, str(e)
+
+user = app_secrets.DATABASE_USER
+pwd = app_secrets.DATABASE_PASSWORD
+db = app_secrets.DATABASE_NAME
+cur_host = app_secrets.DATABASE_HOST
+cur_port = app_secrets.DATABASE_PORT
+
+for label, host, port in [
+    ("当前生产", cur_host, cur_port),
+    ("本机 Docker", "172.17.0.15", "3306"),
+]:
+    c, q, err = test_host(host, port, user, pwd, db)
+    if err:
+        print(f"  [{label}] {host}:{port} -> 失败: {err}")
+    else:
+        print(f"  [{label}] {host}:{port} -> 握手 {c:.0f}ms, 查询 {q:.0f}ms")
+
+print("\n若本机 Docker 成功且 <20ms，应改 app_secrets.py 的 DATABASE_HOST=172.17.0.15 PORT=3306")
+PY
+
+echo ""
+echo "========== 4. 本地 API 响应（ddhq 需 token，测空接口）=========="
+curl -s -o /dev/null -w "127.0.0.1:8001 响应: %{time_total}s\n" http://127.0.0.1:8001/hqhd/ 2>/dev/null || echo "8001 无响应"
+
+echo ""
+echo "========== 5. Nginx 最近 hqhd 延迟（rt=）=========="
+grep 'hqhd' /opt/1panel/apps/openresty/nginx/log/access.log 2>/dev/null | tail -5 || echo "无日志"
+
+echo ""
+echo "========== 修复步骤（本机库可用时）=========="
+echo "1. 备份: cp app_secrets.py app_secrets.py.bak.\$(date +%Y%m%d)"
+echo "2. 改 DATABASE_HOST='172.17.0.15' DATABASE_PORT='3306'"
+echo "3. systemctl restart gunicorn-dianjing.service"
+echo "4. 再 grep hqhd access.log 看 rt= 是否回到 0.05~0.08"