Re: Buffer usage detailed by RelKind in EXPLAIN ANALYZE BUFFERS

On Mon, Feb 13, 2023 at 4:29 PM Andres Freund <andres@anarazel.de> wrote:
> > 1. Some more increments on hot paths. We have to add this tiny toll to
> > every single buffer hit, but it will be seldom of any use.
>
> Additionally, I bet it slows down EXPLAIN (ANALYZE, BUFFERS) noticeably. It's
> already quite expensive...
>

I think collection of instrumentation is done unconditionally.
We always do that
pgBufferUsage.shared_blks_hit++;
when the buffer is in shared_buffers.


Best regards, Andrey Borodin.