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社区首页 >问答首页 >AWS RDS许多连接导致“锁定”

AWS RDS许多连接导致“锁定”
EN

Database Administration用户
提问于 2017-10-05 08:21:42
回答 1查看 3.2K关注 0票数 1

我在t2.小实例上使用Amazon数据库运行一个相当标准的LAMP堆栈。今天,我通过网站监控被告知,数据库似乎已经完全“锁定”了。我发现的症状如下:

  • 运行“显示处理列表”时,不需要很长时间运行查询。
  • Apache web服务器一点也不忙

在查看Cloudwatch中配置的日志时,我发现所有吞吐量指标都接近于0。连接达到17。连接限制按默认配置为InstanceMemory/12 17,因此大约有160个连接。可用内存从264 to增加到234 to。

RDS实例的CPU信用平衡图显示CPU始终在250,web服务器也很高。没有具体的流量,我可以指向,我已经从web服务器日志中选择了一些urls,并在那个小时内计数请求,并与其他时间进行了比较。没有什么能突出的。

我怎么才能进一步诊断呢?

SHOW VARIABLES

代码语言:javascript
运行
复制
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EN

回答 1

Database Administration用户

回答已采纳

发布于 2017-10-11 01:08:45

实施里克·詹姆斯建议的600 of的innodb_buffer_pool_size将有帮助。

改变:

代码语言:javascript
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innodb_buffer_pool_instances = 2  # from 8

...could也很有帮助。

32M的max_allowed_packet不会占用许多活动连接来增加2GB的内存容量。

见5.7文件:

在内部,net_buffer_length可以在会话期间动态增长到这个极限。缺省值为1MB,如果需要,可以使用会话变量来管理特定的需求。

票数 2
EN
页面原文内容由Database Administration提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接:

https://dba.stackexchange.com/questions/187732

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