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.
