DB2 RUNSTATS may be slow due to UTIL_IMPACT_PRIORITY option
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RUNSTATS has an option UTIL
However, be aware of the following implications
When RUNSTATS is throttled, the overall performance impact is controlled by UTIL_IMPACT_LIM:
The DBM config parameter limits the performance degradation of a throttled utility on the workload and
it has 10% as default impact value.
The above means, even if you specify UTIL
run slow because the overall utility(which includes RUNSTATS) impact is limited to 10%.