| From: | Peter Geoghegan <pg(at)bowt(dot)ie> |
|---|---|
| To: | Andres Freund <andres(at)anarazel(dot)de> |
| Cc: | Dmitry Dolgov <9erthalion6(at)gmail(dot)com>, Alexander Lakhin <exclusion(at)gmail(dot)com>, PostgreSQL mailing lists <pgsql-bugs(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: BUG #17255: Server crashes in index_delete_sort_cmp() due to race condition with vacuum |
| Date: | 2021-10-30 21:46:13 |
| Message-ID: | CAH2-WznB2Gdoyi9F4n6q21SBo4sDrhbsidNh=ppUWef2mxBBag@mail.gmail.com |
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| Lists: | pgsql-bugs |
On Sat, Oct 30, 2021 at 2:39 PM Andres Freund <andres(at)anarazel(dot)de> wrote:
> The crash is somewhere in pg_class, which is also manually VACUUMed by the
> test, which could trigger the issue we found in the other thread. The likely
> reason the loop in the repro is needed is that that'll push one of the indexes
> on pg_class over the 512kb/min_parallel_index_scan_size boundary to start
> using paralell vacuum.
Quite possible, but I can't rule out the possibility that it's
actually this other bug, since as you say this is pg_class, a system
catalog index:
I am in too much of a hurry right now to spend the 5 minutes it would
take to confirm either way. (Even if it's not this other bug, I needed
to remind you of its existence anyway.)
--
Peter Geoghegan
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