Re: Log retention query - Mailing list pgsql-general

From Paul Brindusa
Subject Re: Log retention query
Date
Msg-id CAFeSbqjqi1DZjQDatiZehk3GpkX_dFv=qgfsgWxKbsACSWJv_g@mail.gmail.com
Whole thread Raw
In response to Re: Log retention query  (Laurenz Albe <laurenz.albe@cybertec.at>)
Responses Re: Log retention query
Re: Log retention query
List pgsql-general
@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.albe@cybertec.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

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