Re: strange slow query - lost lot of time somewhere

From: Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: David Rowley <dgrowleyml(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: strange slow query - lost lot of time somewhere
Date: 2022-05-03 05:02:09
Message-ID: CAFj8pRDwhx0oarMKTQqFLPBfOk0aX0Zde7thm5LaacLEoiAh+g@mail.gmail.com
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út 3. 5. 2022 v 6:57 odesílatel Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> napsal:

> Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com> writes:
> > there is really something strange (see attached file). Looks so this
> issue
> > is much more related to planning time than execution time
>
> You sure there's not something taking an exclusive lock on one of these
> tables every so often?
>

I am almost sure, I can see this issue only every time when I set a higher
work mem. I don't see this issue in other cases.

Regards

Pavel

>
> regards, tom lane
>

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