Re: ThisTimeLineID in checkpointer and bgwriter processes - Mailing list pgsql-hackers

On 2012-12-20 16:46:21 +0000, Simon Riggs wrote:
> On 20 December 2012 13:19, Amit Kapila <amit.kapila@huawei.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