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Re: BUG #17064: Parallel VACUUM operations cause the error "global/pg_filenode.map contains incorrect checksum" - Mailing list pgsql-bugs

From Thomas Munro
Subject Re: BUG #17064: Parallel VACUUM operations cause the error "global/pg_filenode.map contains incorrect checksum"
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Msg-id CA+hUKG+19bZKidSiWmMsDmgUVe=_rr0m57LfR+nAbWprVDd_cw@mail.gmail.com
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In response to Re: BUG #17064: Parallel VACUUM operations cause the error "global/pg_filenode.map contains incorrect checksum"  (Thomas Munro <thomas.munro@gmail.com>)
Responses Re: BUG #17064: Parallel VACUUM operations cause the error "global/pg_filenode.map contains incorrect checksum"  (Alexander Lakhin <exclusion@gmail.com>)
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On Wed, Jun 23, 2021 at 12:50 PM Thomas Munro <thomas.munro@gmail.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.
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