关于DB time定义问题
The most important time model statistic is database time, or DB time Database time represents the total time spent in database calls, and is an indicator of the total instance workload.
DB time只是所有 user response time时间的一部分，如下图所示：
灰线部分为DB Time
The CPU time spent by the database processing the request and the wait time spent waiting for the database are considered DB time
DB time只是所有 user response time时间的一部分，如下图所示：
灰线部分为DB Time
The CPU time spent by the database processing the request and the wait time spent waiting for the database are considered DB time
来自 “ ITPUB博客 ” ，链接：https://blog.itpub.net/29802484/viewspace-1267888/ ，如需转载，请注明出处，否则将追究法律责任。
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