作者：阿里云数据库产品事业部高级技术专家冷香背景在生产环境，MySQL 数据库实例运行过程中，一些 SQL 语句会发生执行计划的变化，导致增加了数据库稳定性的风险。这里边有几个因素和场景，比如：随着表数据量的变化，以及统计信息的自动收集，CBO optimizer 计算得到了一个cost 更低的 plan，又或者表结构发生了变化，增加和删减了某些索引，或者在实例升级迁移等过程中，.....

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更新时间 2024-02-22 09:58:45

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