| From: | Thomas Munro <thomas(dot)munro(at)gmail(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Heikki Linnakangas <hlinnaka(at)iki(dot)fi>, Alexander Lakhin <exclusion(at)gmail(dot)com>, PostgreSQL mailing lists <pgsql-bugs(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: BUG #17064: Parallel VACUUM operations cause the error "global/pg_filenode.map contains incorrect checksum" |
| Date: | 2021-06-23 02:29:56 |
| Message-ID: | CA+hUKG+19bZKidSiWmMsDmgUVe=_rr0m57LfR+nAbWprVDd_cw@mail.gmail.com |
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| Lists: | pgsql-bugs |
On Wed, Jun 23, 2021 at 12:50 PM Thomas Munro <thomas(dot)munro(at)gmail(dot)com> wrote:
> repro
Here's a quick-and-dirty repro -- just touch test-file and then run
it. It fails about 0.1% of its read loops on ext4, for me, but
outputs nothing on other file systems and OSes I tried (XFS, FBSD UFS,
APFS). Seems a bit like there is a tendency for 64 byte (cache line?)
granularity in the mashed data it prints out.
| Attachment | Content-Type | Size |
|---|---|---|
| concurrent-read-write.c | text/x-csrc | 1.5 KB |
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