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51CTO
18 天
经过这么优化后,生产环境JVM GC一次暂停时长由30秒下降到190毫秒!!
JVM进行GC时,需要对对应堆分区的已用内存进行遍历,假如GC的时候,有堆的一部分内容被交换到swap中,遍历到这部分的时候就须要将其交换回内存;更极端情况同一时刻因为内存空间不足,就需要把内存中堆的另外一部分换到SWAP中去,于是在遍历堆分区的过程 ...
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