一旦终止或重新启动实例或数据库，计数器便会复位。
Counters are reset when you stop and restart an instance or database.
通常情况下没有进行复位而收集的数据不是很有用，因为计数器的时间跨度较长，包括随着负荷起伏跌宕截然不同的工作负载。
Typically the data collected without a reset is not very useful because the counters span a longer period of time, including drastically different workloads along peaks and valleys in load.
这不会使高水位的计数器复位。
应用推荐