mongodb resource_error ai_generated true

MongoServerError: mmapv1 锁获取超时

MongoServerError: mmapv1 lock acquire timeout

ID: mongodb/mmapv1-lock-acquire-timeout

其他格式: JSON · Markdown 中文 · English
90%修复率
85%置信度
1证据数
2023-03-20首次发现

版本兼容性

版本状态引入弃用备注
mongodb-3.2 active — — —
mongodb-3.4 active — — —
mongodb-3.6 active — — —

根因分析

使用已弃用的 MMAPv1 存储引擎时，由于高并发，写入操作等待数据库级锁超时。

English

With the deprecated MMAPv1 storage engine, a write operation waited too long for a database-level lock due to high concurrency.

generic

官方文档

https://www.mongodb.com/docs/v3.6/faq/storage/#does-mmapv1-have-locking-issues

解决方案

  1. Migrate to WiredTiger storage engine which uses document-level concurrency.
  2. Reduce write concurrency by batching writes or using a queue to serialize operations.

无效尝试

常见但无效的做法:

  1. 80% 失败

    Increasing lock timeout just delays failure; the underlying contention remains.

  2. 95% 失败

    Adding more application threads exacerbates lock contention.