| From: | Simon Riggs <simon(at)2ndQuadrant(dot)com> |
|---|---|
| To: | Fujii Masao <masao(dot)fujii(at)gmail(dot)com> |
| Cc: | pgsql-docs <pgsql-docs(at)postgresql(dot)org> |
| Subject: | Re: formula about the number of WAL files |
| Date: | 2010-10-15 13:48:57 |
| Message-ID: | 1287150537.1725.1452.camel@ebony |
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| Thread: | |
| Lists: | pgsql-docs |
On Fri, 2010-10-15 at 19:44 +0900, Fujii Masao wrote:
> As the result of the above, the maximum number of WAL files in
> pg_xlog is
>
> (2 + checkpoint_completion_target) * checkpoint_segments + 1
>
> or
>
> wal_keep_segments + checkpoint_segments + 1
>
> So the original description seems to be correct. Am I missing
> something?
After some thought, I agree.
> # My previous proposal is definitely wrong. Sorry for noise.
I'd say the definition of wal_keep_segments isn't good, which is what is
causing the problem here. Will sort that out another day.
I will update the current code with some comments, so this doesn't
happen again. Will do this on Tuesday now, no time left here.
--
Simon Riggs www.2ndQuadrant.com
PostgreSQL Development, 24x7 Support, Training and Services
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