From: Laurenz Albe <laurenz.albe@cybertec.at>
To: Don Seiler <don@seiler.us>
To: pgsql-performance@lists.postgresql.org
Subject: Re: High COMMIT times
Date: Thu, 07 Jan 2021 03:02:53 +0100
Message-ID: <4f031716ed0a0175ffceffcb40c36c05f66685e3.camel@cybertec.at> (raw)
In-Reply-To: <CAHJZqBCsS5wiUemiArXMXR4Oo63_9bBfssrXWieE7X55dYEvNw@mail.gmail.com>
References: <CAHJZqBCsS5wiUemiArXMXR4Oo63_9bBfssrXWieE7X55dYEvNw@mail.gmail.com>
On Wed, 2021-01-06 at 10:19 -0600, Don Seiler wrote:
> This week we've noticed that we're starting to see spikes where COMMITs are taking much longer than usual.
> Sometimes, quite a few seconds to finish.
>
> This is PostgreSQL 12.4 on Ubuntu 18.04, all running in MS Azure (*not* managed by them).
Unless you are using WITH HOLD cursors on large result sets, this is very likely
I/O overload. Use tools like "sar", "vmstat" and "iostat" to monitor your I/O load.
Yours,
Laurenz Albe
--
Cybertec | https://www.cybertec-postgresql.com
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To: pgsql-performance@postgresql.org
Cc: laurenz.albe@cybertec.at, don@seiler.us, pgsql-performance@lists.postgresql.org
Subject: Re: High COMMIT times
In-Reply-To: <4f031716ed0a0175ffceffcb40c36c05f66685e3.camel@cybertec.at>
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