查看:
show variables like '%max%connect%er%'
set global max_connect_errors = 1000;
show variables like '%connect%timeout%';
performance_schema库中的 host_cache表
解决:
https://blog.csdn.net/iris_xuting/article/details/102689000/
https://www.cnblogs.com/susuyu/archive/2013/05/28/3104249.html
同一个ip在短时间内产生太多(超过mysql数据库max_connection_errors的最大值)中断的数据库连接而导致的阻塞;
这个表记录了 host 的缓存内容,缓存信息包括主机名和 IP,用于避免 DNS 查找。
show variables like '%max%connect%er%'
truncate performance_schema.host_cache
set global host_cache_size=0;
数据库的connect_timeout = 10,网络延迟基本在 14 秒以上。参数max_connect_errors控制同一个 IP连接连续错误次数多过参数max_connect_errors的值时,这之后的连接mysql会阻止。
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