| From: | Pavan Deolasee <pavan(dot)deolasee(at)gmail(dot)com> |
|---|---|
| To: | Fujii Masao <masao(dot)fujii(at)gmail(dot)com> |
| Cc: | pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Too frequent checkpoints ? |
| Date: | 2013-02-11 08:46:08 |
| Message-ID: | CABOikdNkgdOyiHVpxubppsM4WvxgDnKTr509AW6GrE3NebTqhA@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Fri, Feb 8, 2013 at 10:25 PM, Fujii Masao <masao(dot)fujii(at)gmail(dot)com> wrote:
.>
> BTW, the cause of the problem is that the following sequences happens.
>
> 1. archive_timeout switches WAL file because checkpoint WAL record has
> has been written since last switch
Thank you for explaining that. I also noticed that the WAL file switch
happens after archive_timeout seconds irrespective of whether
archive_mode is turned ON or not. This happens because we don't check
if XLogArchivingActive() in CheckArchiveTimeout() function. It looks
wrong to me. But if it's that way for a good reason, shouldn't we at
least document this behaviour ?
Thanks,
Pavan
--
Pavan Deolasee
http://www.linkedin.com/in/pavandeolasee
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