Hi, On 2024-05-16 14:50:50 -0400, Tom Lane wrote: > Nathan Bossart <nathandboss...@gmail.com> writes: > > I suspect it will be difficult to investigate this one too much further > > unless we can track down a copy of the control file with the bad checksum. > > Other than searching for any new code that isn't doing the appropriate > > locking, maybe we could search the buildfarm for any other occurrences. I > > also seem some threads concerning whether the way we are reading/writing > > the control file is atomic. > > The intention was certainly always that it be atomic. If it isn't > we have got *big* trouble.
We unfortunately do *know* that on several systems e.g. basebackup can read a partially written control file, while the control file is being updated. Thomas addressed this partially for frontend code, but not yet for backend code. See https://postgr.es/m/CA%2BhUKGLhLGCV67NuTiE%3Detdcw5ChMkYgpgFsa9PtrXm-984FYA%40mail.gmail.com Greetings, Andres Freund
