python network_error ai_generated true

sqlalchemy.exc.TimeoutError: QueuePool 大小限制 5 溢出 10 已达到，连接超时，超时时间 30

sqlalchemy.exc.TimeoutError: QueuePool limit of size 5 overflow 10 reached, connection timed out, timeout 30

ID: python/sqlalchemy-connection-timeout

其他格式: JSON · Markdown 中文 · English
80%修复率
86%置信度
0证据数
2024-08-01首次发现

版本兼容性

版本状态引入弃用备注
3.x active — — —

根因分析

连接池已耗尽，因为太多连接正在使用中，等待空闲连接超时。

English

The connection pool is exhausted because too many connections are in use, and the timeout is exceeded waiting for a free connection.

generic

解决方案

  1. 85% 成功率 Increase pool_size and overflow, and ensure connections are closed 
    engine = create_engine('postgresql://user:pass@localhost/db', pool_size=20, max_overflow=40, pool_timeout=60)
  2. 95% 成功率 Use context managers for sessions to ensure closure 
    with Session() as session:
    session.query(User).all()

无效尝试

常见但无效的做法:

  1. Increasing pool_size without monitoring usage 50% 失败

    This may mask the underlying issue of connection leaks.

  2. Restarting the application 70% 失败

    Connections may leak again if not properly closed.