On 30 October 2017 at 15:31, Michael Paquier <michael.paqu...@gmail.com> wrote: > On Mon, Oct 30, 2017 at 2:22 PM, Simon Riggs <si...@2ndquadrant.com> wrote: >> On 25 October 2017 at 00:17, Michael Paquier <michael.paqu...@gmail.com> >> wrote: >>> - * Delete old log files (those no longer needed even for previous >>> - * checkpoint or the standbys in XLOG streaming). >>> + * Delete old log files and recycle them >>> */ >>> Here that's more "Delete or recycle old log files". Recycling of a WAL >>> segment is its renaming into a newer segment. >> >> Sometimes files are deleted if there are too many. > > Sure, but one segment is never deleted and then recycled, which is > what your new comment implies as I understand it.
I guess it depends how you read it. The function performs both deletion AND recycling Yet one file is only ever deleted OR recycled >>> - checkPointLoc = ControlFile->prevCheckPoint; >>> + /* >>> + * It appears to be a bug that we used to use >>> prevCheckpoint here >>> + */ >>> + checkPointLoc = ControlFile->checkPoint; >>> Er, no. This is correct because we expect the prior checkpoint to >>> still be present in the event of a failure detecting the latest >>> checkpoint. >> >> I'm removing "prevCheckPoint", so not sure what you mean. > > I mean that there is no actual bug here. And changing the code as you > do is correct, but the comment is not. Thanks -- Simon Riggs http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
