Spotlight on DB2 6.9.3 - Release Notes

Req. Time Std. Dev.

The standard deviation (in milliseconds) of the execution times for all database requests in this service subclass. This value is based on execution times measured since statistics were last reset.

Note: This value is available only if the COLLECT AGGREGATE ACTIVITY DATA clause is enabled in the service class definition. Additionally, this statistic might display -1 if the associated histogram is not large enough to handle the historical data needed to calculate this value.