| From: | Michael Paquier <michael(at)paquier(dot)xyz> |
|---|---|
| To: | Kyotaro Horiguchi <horikyota(dot)ntt(at)gmail(dot)com> |
| Cc: | tgl(at)sss(dot)pgh(dot)pa(dot)us, 875941708(at)qq(dot)com, pgsql-hackers(at)lists(dot)postgresql(dot)org, masao(dot)fujii(at)oss(dot)nttdata(dot)com, nathandbossart(at)gmail(dot)com |
| Subject: | Re: Fix primary crash continually with invalid checkpoint after promote |
| Date: | 2022-04-27 03:00:49 |
| Message-ID: | Ymix4QTcqXKaiaDY@paquier.xyz |
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| Lists: | pgsql-bugs pgsql-hackers |
On Wed, Apr 27, 2022 at 11:24:11AM +0900, Kyotaro Horiguchi wrote:
> Zhao Rui's proposal is retension of WAL files according to (the wrong
> content of) control file.
>
> Aside from the fact that it may let slots be invalidated ealier, It's
> not great that an acutally performed restartpoint is forgotten, which
> may cause the next crash recovery starts from an already performed
> checkpoint.
Yeah, I was analyzing this problem and took a look at what's proposed
here, and I agree that what is proposed on this thread would just do
some unnecessary work if we find ourselves in a situation where we
we need to replay from a point earlier than necessary, aka the
checkpoint that should have been already finished.
--
Michael
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