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[Java] 求解 springboot+mysql 随机出现的异常延迟

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两行紧挨着的代码，很简单的根据 id 更新一行数据，然后打印函数执行到此时的耗时

PkV4oaY.png


打印出来的日志如下

pQy6GQR.png


正常情况下两个打印出来的耗时差值应该是 10ms 以内
但是每天会随机出现几个时间点，两个耗时差值会大于 1s 甚至 10 ～ 20s
日志中可以看到并不是语句执行出现耗时，mybatis 已经把执行结果打印出来了
耗时出现在语句执行之后，但是出现结果之后应该就立即到打印日志了，这之间没有其他代码了，没明白这个延时是怎么产生的，求助

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