On Tue, Apr 12, 2022 at 03:46:31PM +0900, Kyotaro Horiguchi wrote: > At Mon, 11 Apr 2022 09:52:57 -0700, Nathan Bossart <nathandboss...@gmail.com> > wrote in >> I traced this back a while ago. I believe the link() was first added in >> November 2000 as part of f0e37a8. This even predates WAL recycling, which >> was added in July 2001 as part of 7d4d5c0. > > f0e37a8 lacks discussion.. It introduced the CHECKPOINT command from > somwhere out of the ML.. This patch changed XLogFileInit to > supportusing existent files so that XLogWrite can use the new segment > provided by checkpoint and still allow XLogWrite to create a new > segment by itself.
Yeah, I've been unable to find any discussion besides a brief reference to adding checkpointing [0]. [0] https://postgr.es/m/8F4C99C66D04D4118F580090272A7A23018D85%40sectorbase1.sectorbase.com -- Nathan Bossart Amazon Web Services: https://aws.amazon.com
