fix: 修复 Gunicorn systemd 配置与 MySQL 连接复用以缓解卡顿

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

a_long_dianjing/settings.py

@@ -125,6 +125,7 @@ DATABASES = {
         'HOST': app_secrets.DATABASE_HOST,
         'PASSWORD': app_secrets.DATABASE_PASSWORD,
         'PORT': app_secrets.DATABASE_PORT,
+        'CONN_MAX_AGE': 600,
         'OPTIONS': {
             'charset': 'utf8mb4',
             'init_command': "SET time_zone='+08:00'",

deploy/systemd/README.md

@@ -0,0 +1,47 @@
+# Gunicorn systemd（生产环境）
+
+修复 sync×9 + 访问日志灌 journal 导致的卡顿。
+
+## 服务器安装（一次性）
+
+```bash
+cd /opt/1panel/apps/openresty/nginx/www/sites/43.142.166.152.443/django
+git pull origin main
+
+# 备份旧 service（若有）
+cp /etc/systemd/system/gunicorn-dianjing.service /etc/systemd/system/gunicorn-dianjing.service.bak 2>/dev/null || true
+
+cp deploy/systemd/gunicorn-dianjing.service /etc/systemd/system/gunicorn-dianjing.service
+
+pkill -f 'gunicorn.*a_long_dianjing' 2>/dev/null || true
+sleep 2
+
+systemctl daemon-reload
+systemctl enable gunicorn-dianjing.service
+systemctl restart gunicorn-dianjing.service
+
+systemctl status gunicorn-dianjing.service --no-pager | head -12
+pgrep -af gthread | head -2
+curl -s -o /dev/null -w '8001: HTTP:%{http_code} %{time_total}s\n' http://127.0.0.1:8001/
+```
+
+## 1Panel
+
+关闭该站点 **Python 运行环境自动管理**，避免与 systemd 冲突。
+
+## 日常
+
+```bash
+systemctl restart gunicorn-dianjing.service
+tail -f /tmp/gunicorn-error.log
+```
+
+## journal 限制（可选，建议）
+
+```bash
+grep -q '^SystemMaxUse=' /etc/systemd/journald.conf \
+  && sed -i 's/^SystemMaxUse=.*/SystemMaxUse=200M/' /etc/systemd/journald.conf \
+  || echo 'SystemMaxUse=200M' >> /etc/systemd/journald.conf
+journalctl --vacuum-size=200M
+systemctl restart systemd-journald
+```

deploy/systemd/gunicorn-dianjing.service

@@ -0,0 +1,17 @@
+[Unit]
+Description=Gunicorn a_long_dianjing Django Service
+After=network.target
+
+[Service]
+Type=simple
+User=root
+Group=root
+WorkingDirectory=/opt/1panel/apps/openresty/nginx/www/sites/43.142.166.152.443/django
+ExecStart=/usr/local/bin/gunicorn --bind 127.0.0.1:8001 --workers 4 --threads 4 --worker-class gthread --timeout 120 --log-level warning --access-logfile /dev/null --error-logfile /tmp/gunicorn-error.log a_long_dianjing.wsgi:application
+Restart=always
+RestartSec=3
+StandardOutput=null
+StandardError=file:/tmp/gunicorn-systemd.err.log
+
+[Install]
+WantedBy=multi-user.target