Re: pgsql: Avoid tricky race condition recording XLOG_HINT

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От Tom Lane
Тема Re: pgsql: Avoid tricky race condition recording XLOG_HINT
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Msg-id 13130.1365432470@sss.pgh.pa.us
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Ответ на Re: pgsql: Avoid tricky race condition recording XLOG_HINT  (Simon Riggs <simon@2ndQuadrant.com>)
Ответы Re: pgsql: Avoid tricky race condition recording XLOG_HINT  (Andres Freund <andres@2ndquadrant.com>)
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Simon Riggs <simon@2ndQuadrant.com> writes:
> On 8 April 2013 15:29, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>> Just for the record, the right way to handle that kind of change is to
>> change XLOG_PAGE_MAGIC, not catversion.  A database's catalog version
>> might not be available to code that is inspecting WAL files and would
>> like to know what format it should expect.

> I was so happy Andres had remembered to bump the catversion like I often
> do, it didn't occur to me it was the wrong one. My bad, sorry.

No problem.  XLOG_PAGE_MAGIC is already different from what it was in
9.2, so it's mostly academic whether or not we bump it again during
the devel cycle.

            regards, tom lane


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