Re: Built-in log rotation

Kris Kiger wrote:
> Greetings! I've been doing some research into log rotation software and
> ran into this, while looking through the postgres site:
>
> "There is a built-in log rotation program, which you can use by setting
> the configuration parameter redirect_stderr to true in postgresql.conf."
> http://www.postgresql.org/docs/8.1/interactive/logfile-maintenance.html
>
> My question is, how does it rotate logs?

It closes the old file and opens a new one -- new name, new file
descriptor, so the problem you mention below doesn't exist anymore.

> Does it perform a
> copy/truncate of the logfile? I know in older versions of postgres, if
> you tried to move the log file, and create one with the same name, the
> server wouldn't actually write to it without a restart...at least in
> linux it wouldn't.

This code is "new" (only two years old).

--
Alvaro Herrera http://www.CommandPrompt.com/
PostgreSQL Replication, Consulting, Custom Development, 24x7 support