Message-ID: <359bfb1ceb886a765436b4ae1e98639f992abb5c.camel@cybertec.at>
Subject: Re: Does export operation cancel SQLs?
From: Laurenz Albe <laurenz.albe@cybertec.at>
To: shammat@gmx.net, pgsql-admin@lists.postgresql.org
Date: Wed, 19 Feb 2025 12:18:42 +0100
In-Reply-To: <40fe637f-d3a1-4af5-b100-2e7fedca72bd@gmx.net>
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On Wed, 2025-02-19 at 12:10 +0100, shammat@gmx.net wrote:
> Laurenz Albe schrieb am 19.02.2025 um 09:43:
> > > We have PostgreSQL 16 running in GCP cloud SQL. When export job runs we
> > > are noticing these messages excessively:
> > > 
> > > db=postgres,user=postgres ERROR:  canceling statement due to user request
> > > 
> > > Does Export cancel the SQLs? If not, why are we noticing these messages
> > > excessively during the export operation? The load on the instance is minimal.
> > 
> > I am not sure what exactly you mean by "export".  A pg_dump?
> > But I am not aware of any operation that would cancel statements in other
> > sessions.  Perhaps someone or something in your application sends cancel
> > requests when a statement is running too long, and the concurrent export
> > slows down the system.
> 
> What if the "export" is done on a read-only replica?
> 
> Could this be a "canceling statement due to conflict with recovery" in disguise?

That would be a different error message.

Yours,
Laurenz Albe

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