Re: ThisTimeLineID in checkpointer and bgwriter processes

On Thursday, December 20, 2012 11:15 PM Heikki Linnakangas wrote:
> On 20.12.2012 18:19, Fujii Masao wrote:
> > InstallXLogFileSegment() also uses ThisTimeLineID. But your recent
> commit
> > doesn't take care of it and prevents the standby from recycling the
> WAL files
> > properly. Specifically, the standby recycles the WAL file to wrong
> name.
>
> A-ha, good catch. So that's actually a live bug in 9.1 and 9.2 as well:
> after the recovery target timeline has changed, restartpoints will
> continue to preallocate/recycle WAL files for the old timeline. That's
> otherwise harmless, but the useless WAL files waste space, and
> walreceiver will have to always create new files.
>
> So instead of always running with ThisTimeLineID = 0 in the
> checkpointer
> process, I guess we'll have to update it to the timeline being
> replayed,
> when creating a restartpoint.

Shouldn't there be a check if(RecoveryInProgress), before assigning
RecoveryTargetTLI to ThisTimeLineID in CreateRestartPoint()?

With Regards,
Amit Kapila.