Hello, Tom.
>> This is a pretty broad claim to make on the basis of one undocumented
>> test case on one unmentioned platform.
> I'll try to use pg_stat_kcache to check the difference between Wall
> and CPU for my case.
In my case I see pretty high correlation of pg_stat_kcache and
pg_stat_statement (clock_gettime vs getrusage).
Looks like CPU usage is hidden somewhere else (planning probably, not
measured on postgres 11, but I see really high
*clauselist_selectivity* in perf).
Thanks,
Michail.
