| From: | Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com> |
|---|---|
| To: | Fujii Masao <masao(dot)fujii(at)gmail(dot)com> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: pg_ctl emits strange warning message |
| Date: | 2010-09-14 07:46:22 |
| Message-ID: | 4C8F284E.3040205@enterprisedb.com |
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| Lists: | pgsql-hackers |
On 14/09/10 03:39, Fujii Masao wrote:
> On Tue, Sep 14, 2010 at 12:35 AM, Heikki Linnakangas
> <heikki(dot)linnakangas(at)enterprisedb(dot)com> wrote:
>> Hmm, looking at this more closely, I'm a bit confused. We already rename
>> away backup_label at the beginning of recovery. Under what circumstances do
>> we have a problem? This starts to seem like a complete non-issue to me.
>
> A checkpoint record is read before backup_label file is renamed, so
> the problem happens if shutdown is requested while the standby server
> is waiting for the WAL containing a checkpoint record to arrive from
> the master. This happened some times in my box when testing HS/SR.
Ok, I see. Shouldn't be very common, but might happen if you have a set
restore_command incorrectly for example.
--
Heikki Linnakangas
EnterpriseDB http://www.enterprisedb.com
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