On 2016-04-14 07:59:07 +0530, Amit Kapila wrote:
> What you want to see by prewarming?
Prewarming appears to greatly reduce the per-run variance on that
machine, making it a lot easier to get meaningful results. Thus it'd
make it easier to compare pre/post padding numbers.
> Will it have safe effect, if the tests are run for 10 or 15 mins
> rather than 5 mins?
s/safe/same/? If so, no, I doesn't look that way. The order of buffers
appears to play a large role; and it won't change in a memory resident
workload over one run.
Greetings,
Andres Freund