| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Julien Rouhaud <rjuju123(at)gmail(dot)com> |
| Cc: | Bruce Momjian <bruce(at)momjian(dot)us>, Stephen Frost <sfrost(at)snowman(dot)net>, Christoph Berg <myon(at)debian(dot)org>, Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>, Kyotaro Horiguchi <horikyota(dot)ntt(at)gmail(dot)com>, Magnus Hagander <magnus(at)hagander(dot)net>, Fujii Masao <masao(dot)fujii(at)oss(dot)nttdata(dot)com>, Michael Paquier <michael(at)paquier(dot)xyz>, Andres Freund <andres(at)anarazel(dot)de>, Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org>, Peter Eisentraut <peter(dot)eisentraut(at)enterprisedb(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: compute_query_id and pg_stat_statements |
| Date: | 2021-05-14 01:47:02 |
| Message-ID: | 1787238.1620956822@sss.pgh.pa.us |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
Julien Rouhaud <rjuju123(at)gmail(dot)com> writes:
> On Fri, May 14, 2021 at 3:12 AM Bruce Momjian <bruce(at)momjian(dot)us> wrote:
>> I was surprised it was ~2%.
> Just to be clear, the 2% was a worst case scenario, ie. a very fast
> read-only query on small data returning a single row. As soon as you
> get something more realistic / expensive the overhead goes away.
Of course, for plenty of people that IS the realistic scenario that
they care about max performance for.
regards, tom lane
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Justin Pryzby | 2021-05-14 02:01:41 | Re: PG 14 release notes, first draft |
| Previous Message | Tom Lane | 2021-05-14 01:44:07 | Re: OOM in spgist insert |