| From: | Andres Freund <andres(at)2ndquadrant(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 17:01:40 |
| Message-ID: | 20121220170139.GJ4303@awork2.anarazel.de |
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| Thread: | |
| Lists: | pgsql-hackers |
On 2012-12-20 16:46:21 +0000, Simon Riggs 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.
It's called from CreateRestartPoint. And the pre-inited files get used
by the walreceiver and I would guess thats beneficial at elast for sync
rep...
Greetings,
Andres Freund
--
Andres Freund http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
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