OS配置大页参考:https://www.dbaup.com/mysqlshujukupeizhidaye.htm安装参数配置修改max_connections、innodb_buffer_pool ... 阅读全文
背景由于漏扫,mysql 安全漏洞(CVE-2023-38545)、Oracle MySQL Server 安全漏洞(CVE-2023-0464)、Oracle mysql 敏感信息泄漏漏洞(CVE- ... 阅读全文
设置参数slave_skip_error使用GTID复制从库跳过错误,不支持设置sql_slave_skip_counter,但是支持设置参数slave_skip_errors,只能在参数文件中设置 ... 阅读全文
原文:https://www.percona.com/blog/why-are-queries-with-many-in-values-more-expensive-after-upgrading-t ... 阅读全文
MySQL客户端安装-- 安装MySQL客户端rpm -Uvh https://repo.mysql.com//mysql80-community-release-el7.rpyum-config- ... 阅读全文
现象Your password has expired. To log in you must change it using a client that supports expired passw ... 阅读全文
Oracl参考:https://www.dbaup.com/oraclezhongduibiaohelietianjiazhushijichaxunzhushi.htm查询表的注释SELECT ... 阅读全文
现象ERROR 1040 (HY000): Too many connections 该错误表示mysql连接数超过最大连接数解决show variables like '%max_conn ... 阅读全文
简介在之前的博客中已经配置过了,可以参考:https://www.dbaup.com/oracle-database-gatewaystoumingwangguandeanzhuanghepeizhi ... 阅读全文
Oracl-- 一个查询慢的sql例子select count(1) from dba_objects inner join user_objects b on 1=inner join use ... 阅读全文

