mysql错误 IP address 'xxxx' could not be resolved: Name or service not known
作者:高景洋 日期:2022-03-13 15:25:26 浏览次数:888
mysql日志显示[Warning] IP address 'xxxx' could not be resolved: Name or service not known，那是因为mysql默认会反向解析DNS，对于访问者Mysql不会判断是hosts还是ip都会进行dns反向解析，频繁地查询数据库和权限检查，这大大增加了数据库的压力，导致数据库连接缓慢，严重的时候甚至死机，出现“连接数据库时出错”等字样。
解决办法：禁用dns反查即可
进入/etc 找到mysql的配置文件my.cnf（linux环境下）或者my.ini(windows环境下)进行编辑加入如下一行即可：
[mysqld]
skip-name-resolve
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X-Host1: r4.com.cn
X-Host2: r4.com.cn
X-Host3: 127.0.0.1:8080
X-Forwarded-For: 3.145.60.166
X-Real-Ip: 3.145.60.166
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