| From: | Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com> |
|---|---|
| To: | Simon Riggs <simon(at)2ndQuadrant(dot)com> |
| Cc: | Guillaume Smet <guillaume(dot)smet(at)gmail(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Andreas Pflug <pgadmin(at)pse-consulting(dot)de>, Fujii Masao <masao(dot)fujii(at)gmail(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Clean shutdown and warm standby |
| Date: | 2009-05-28 13:19:33 |
| Message-ID: | 4A1E8F65.4030807@enterprisedb.com |
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| Thread: | |
| Lists: | pgsql-hackers |
Simon Riggs wrote:
> On Thu, 2009-05-28 at 14:04 +0300, Heikki Linnakangas wrote:
>
>> I've committed a patch to do the RequstXLogSwitch() before shutdown
>> checkpoint as discussed. It seems safe to me. (sorry for the delay, and
>> thanks for the reminder)
>
> Not sure if that is a fix that will work in all cases.
>
> There is a potential timing problem with when the archiver is shutdown:
> that may now be fixed in 8.4, see what you think.
Can you elaborate?
> Also if archiving is currently stalled, then files will not be
> transferred, even if you switch xlogs. So this is at best a partial fix
> to the problem and the need for a manual check of file contents
> remains.
Yep. Maybe we should print the filename of the last WAL segment to the
log at shutdown, so that you can easily check that you have everything
in the archive.
--
Heikki Linnakangas
EnterpriseDB http://www.enterprisedb.com
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