| From: | Fujii Masao <masao(dot)fujii(at)gmail(dot)com> |
|---|---|
| To: | Simon Riggs <simon(at)2ndquadrant(dot)com> |
| Cc: | Amit Kapila <amit(dot)kapila(at)huawei(dot)com>, Heikki Linnakangas <hlinnakangas(at)vmware(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: ThisTimeLineID in checkpointer and bgwriter processes |
| Date: | 2012-12-20 16:53:59 |
| Message-ID: | CAHGQGwE_O_U5juUDHfqtFXQqLxtkPrpbTWFffnTC3hc-pdW1DA@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Fri, Dec 21, 2012 at 1:46 AM, Simon Riggs <simon(at)2ndquadrant(dot)com> wrote:
> On 20 December 2012 13:19, Amit Kapila <amit(dot)kapila(at)huawei(dot)com> wrote:
>
>> True, it might not have any functionality effect in RemoveOldXlogFiles().
>> However it can be used in PreallocXlogFiles()->XLogFileInit() as well.
>
> Which is never called in recovery because we never write WAL.
No. CreateRestartPoint() calls PreallocXlogFiles(). Walreceiver may
write WAL, so PreallocXlogFiles() would be useful even during recovery
to some extent.
Regards,
--
Fujii Masao
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