Re: [HACKERS] Re: [COMMITTERS] pgsql: Perform only one ReadControlFile() during startup.

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От Tom Lane
Тема Re: [HACKERS] Re: [COMMITTERS] pgsql: Perform only one ReadControlFile() during startup.
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Msg-id 23456.1505586621@sss.pgh.pa.us
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Ответ на [HACKERS] Re: [COMMITTERS] pgsql: Perform only one ReadControlFile() duringstartup.  (Andres Freund <andres@anarazel.de>)
Ответы Re: [HACKERS] Re: [COMMITTERS] pgsql: Perform only oneReadControlFile() during startup.  (Andres Freund <andres@anarazel.de>)
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Andres Freund <andres@anarazel.de> writes:
> Looking into it.

I wonder whether we shouldn't just revert this patch altogether.
Certainly, extra reads of pg_control are not a noticeable performance
problem.  I'm now quite worried about whether we aren't introducing
hazards of using stale values from the file; if a system crash isn't
enough to get it to flush its cache, then what is?
        regards, tom lane


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