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From: Anthonin Bonnefoy <anthonin.bonnefoy@datadoghq.com>
Date: Mon, 16 Mar 2026 10:45:35 +0100
Message-ID: 
 <CAO6_XqqvqMqUgZ0swSkB2VNUFos6b6Vbt9BpOEGCHz4nCQEi+g@mail.gmail.com>
Subject: Re: Shutdown indefinitely stuck due to unflushed FPI_FOR_HINT record
To: Fujii Masao <masao.fujii@gmail.com>
Cc: Andres Freund <andres@anarazel.de>,
 Alexander Lakhin <exclusion@gmail.com>,
	PostgreSQL Hackers <pgsql-hackers@postgresql.org>
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On Mon, Mar 16, 2026 at 6:39=E2=80=AFAM Fujii Masao <masao.fujii@gmail.com>=
 wrote:
> Since Tomas added GetXLogInsertEndRecPtr() in commit b1f14c96720,
> I updated the patch to use it. Patch attached.
> Barring any objections, I will commit it.
>
> -       XLogFlush(GetXLogWriteRecPtr());
> +       XLogFlush(GetXLogInsertEndRecPtr());

Thanks for the updated patch! I've run my test script against the
patch and there's no more "xlog flush request xxx is not satisfied"
errors reported.

> I excluded the above change from the patch because it seems like a separa=
te
> issue. I also wonder whether this code could cause an error in XLogFlush(=
)
> even when GetXLogWriteRecPtr() is used.

Ha right, I've mixed Insert and Write and thought that
FinishSyncWorker was also doing a XlogFlush(GetXLogInsertRecPtr())
when writing the patch. If I try to trigger the partial record issue,
GetXLogWriteRecPtr() points at the end of the WAL page containing the
beginning of the FPI_FOR_HINT, there's no attempt to flush in the
future. So FinishSyncWorker doesn't seem impacted by the issue.

Regards,
Anthonin Bonnefoy