Generally, the value for WaitTime for event 31 should be less than the value for Waits. High values for WaitTime may indicate disk contention or slow performance. Query monIOQueue and monDeviceIO to identify overloaded or slow disks.
A high value for WaitTime for event 31 may also indicate that the data cache is too small, causing pages in the data cache to reach the wash area frequently and forcing the checkpoint process to perform more writes than necessary.
