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Question: "Why have we started to see such a big increase in log file sync wait time?"
问题：“为什么我们开始长时间等待log file sync(同步写日志文件)？ ”？
When the CPU load goes up, the time taken for a log file sync round trip can increase even when the number of log file syncs and the volume of redo log generated doesn't change.
CPU负荷增长尽管(写)事务量没有变写日志个数没有变日志文件同步的往返信号传输时间就会延长。
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