Date: Wed, 11 Jun 2014 23:28:21 -0700 (PDT)
From: David G Johnston <david.g.johnston@gmail.com>
To: pgsql-docs@postgresql.org
Message-ID: <1402554501237-5806947.post@n5.nabble.com>
In-Reply-To: <53992FF8.2060702@po.ntts.co.jp>
References: <53992FF8.2060702@po.ntts.co.jp>
Subject: Re: disabling log_rotation_age feature.
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Tomonari Katsumata-2 wrote
> Hi,
> 
> I'm reading about log_rotation_age.
> And I noticed that the setting for disabling the feature is not clear.
> 
> 
> The document tells us to set it to ZERO if we want to disable the feature.
> However, the feature would be disabled if we set it less than one minute.
> 
> [Example]
> *******************************************
> $ grep log_rotation_age ${PGDATA}/postgresql.conf
> #log_rotation_age = 1d # Automatic rotation of logfiles will
> log_rotation_age = 10s # Automatic rotation of logfiles will
> 
> $ psql postgres
> psql (9.5devel)
> Type "help" for help.
> 
> postgres=# show log_rotation_age ;
> log_rotation_age
> ------------------
> 0
> (1 row)
> *******************************************
> 
> I think this fact should be written on document for users.
> 
> [Fix Example]
> *********
> After this many minutes have elapsed, a new log file will
> - be created. Set to zero to disable time-based creation of
> + be created. Set to zero or less than one minute to disable time-based
> new log files.
> *********

I suggest documenting, if correct, that maximum resolution is minutes
(rounding down) and thus any sub-1-minute value will be interpreted as zero
and disable the feature.

David J.


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