Re: Why so many xlogs?

On Mon, Nov 01, 2010 at 07:18:22PM +0100, Filip Rembiałkowski wrote:
> 2010/11/1 hubert depesz lubaczewski <depesz@depesz.com>:
>
> > as I understand, max number of xlog files in pg_xlog should be ( 1 + 2 *
> > checkpoint_segments ).
>
> why?
>
> for a server overloaded with R/W transactions, it's possible to go beyond this.
> checkpoints just do not keep up.
> right now I have an 8.3 with checkpoint_segments=3, constantly running
> pgbench and I see 8 WAL segments.

you will notice in the logs that the system doesn't look like very
loaded.
i mean - there is fair amount of work, but nothing even resembling
"overloaded".

Best regards,

depesz

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