| 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 09:19:56 |
| Message-ID: | 1287134396.1725.1300.camel@ebony |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-docs |
On Thu, 2010-10-14 at 12:00 +0900, Fujii Masao wrote:
> ----------------
> 29.4. WAL Configuration
>
> There will always be at least one WAL segment file, and will normally not
> be more than (2 + checkpoint_completion_target) * checkpoint_segments + 1
> or checkpoint_segments + wal_keep_segments + 1 files.
> ----------------
>
> The above formula is wrong. The correct is
>
> (2 + checkpoint_completion_target) * checkpoint_segments +
> wal_keep_segments + 1
>
> The attached patch fixes this fault.
The current docs are wrong, but your re-definition doesn't match the
actual code in CreateCheckPoint().
I've updated the docs to reflect how the code behaves.
--
Simon Riggs www.2ndQuadrant.com
PostgreSQL Development, 24x7 Support, Training and Services
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Simon Riggs | 2010-10-15 09:20:51 | Re: [HACKERS] Docs for archive_cleanup_command are poor |
| Previous Message | Robert Haas | 2010-10-14 23:17:49 | Re: Documenting removal of nonnullvalue() and friends |