将Hibernate的日志级别调成trace后，我们发现是更新会话缓存造成了延时。
After turning on Hibernate's log level to trace, we found it was the updating of session cache that caused the delay.
端到端延时是指从源表发生更新到此更新应用到目标表所经历的时间。
End-to-end latency is the time it takes from the point in time when an update occurs at a source table until that update is applied to the target.
端到端延时是指从源表发生更新到此更新应用到目标表所经历的时间。
End-to-end latency is the time it takes from the point in time when an update occurs at a source table until that update is applied to the target.
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