| From: | David Rowley <david(dot)rowley(at)2ndquadrant(dot)com> |
|---|---|
| To: | Justin Pryzby <pryzby(at)telsasoft(dot)com> |
| Cc: | Amit Langote <Langote_Amit_f8(at)lab(dot)ntt(dot)co(dot)jp>, "Imai, Yoshikazu" <imai(dot)yoshikazu(at)jp(dot)fujitsu(dot)com>, Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: speeding up planning with partitions |
| Date: | 2019-01-07 08:40:50 |
| Message-ID: | CAKJS1f8fmcs2Smsm0K-2ZLZjv2GUs+qFZsaL2FmUi8Hed4dstw@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Fri, 4 Jan 2019 at 04:39, Justin Pryzby <pryzby(at)telsasoft(dot)com> wrote:
> Running 11dev with your v10 patch applied, this takes 2244ms with empty buffer
> cache after postmaster restarted on a totally untuned instance (and a new
> backend, with no cached opened files).
>
> I was curious why it took even 2sec, and why it did so many opens() (but not
> 20k of them that PG11 does):
It would be pretty hard to know that without seeing the query plan.
--
David Rowley http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
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