Re: Log retention query

From: Paul Brindusa <paulbrindusa88(at)gmail(dot)com>
To: Laurenz Albe <laurenz(dot)albe(at)cybertec(dot)at>
Cc: pgsql-general <pgsql-general(at)postgresql(dot)org>
Subject: Re: Log retention query
Date: 2025-01-28 13:40:42
Message-ID: CAFeSbqjqi1DZjQDatiZehk3GpkX_dFv=qgfsgWxKbsACSWJv_g@mail.gmail.com
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@Junwang apologies, I should have mentioned that we've tried setting up a
crontab and it has not worked. Have you got something similar working?

@Laurenz: log_filename: postgresql-%Y-%m-%d.log -- if we redo the syntax
can we make it trigger garbage collection on 180 days?

On Tue, Jan 28, 2025 at 1:28 PM Laurenz Albe <laurenz(dot)albe(at)cybertec(dot)at>
wrote:

> On Tue, 2025-01-28 at 09:57 +0000, Paul Brindusa wrote:
> > Good morning everyone,
> >
> > Before I get on with today's problem, I would like to say how much I
> appreciate this community and everything that you do for end users.
> >
> > In today's problem I would like to understand if the following lines in
> our config handle the log rotation for our clusters?
> >
> > log_checkpoints: on
> > logging_collector: on
> > log_truncate_on_rotation: on
> > log_rotation_age: 1d
> > log_rotation_size: 1GB
> > log_error_verbosity: verbose
> >
> > I have been deleting the logs manually for the last month, since I am
> confused how the log collector rotates them.
> >
> > Am looking to delete logs older than 180 days. What are we doing wrong
> in the config?
>
> It all depends on how you configured "log_filename".
>
> If the setting is "postgresql-%a.log" or "postgresql-%d.log", PostgreSQL
> will recycle the old log files once a week or once a month.
>
> If the setting is the default "postgresql-%Y-%m-%d_%H%M%S.log", the same
> log file name will never be reused, and there will be no log rotation.
>
> PostgreSQL doesn't actively delete old log files.
>
> Yours,
> Laurenz Albe
>

--
Kind Regards,
Paul Brindusa
paulbrindusa88(at)gmail(dot)com

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