Re: 8.4 open item: copy performance regression?

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От Tom Lane
Тема Re: 8.4 open item: copy performance regression?
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Msg-id 7086.1245423944@sss.pgh.pa.us
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Ответ на Re: 8.4 open item: copy performance regression?  (Stefan Kaltenbrunner <stefan@kaltenbrunner.cc>)
Ответы Re: 8.4 open item: copy performance regression?  (Stefan Kaltenbrunner <stefan@kaltenbrunner.cc>)
Re: 8.4 open item: copy performance regression?  (Stefan Kaltenbrunner <stefan@kaltenbrunner.cc>)
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Just eyeing the code ... another thing we changed since 8.3 is to enable
posix_fadvise() calls for WAL.  Any of the complaints want to try diking
out this bit of code (near line 2580 in src/backend/access/transam/xlog.c)?

#if defined(USE_POSIX_FADVISE) && defined(POSIX_FADV_DONTNEED)if (!XLogArchivingActive() &&
(get_sync_bit(sync_method)& PG_O_DIRECT) == 0)    (void) posix_fadvise(openLogFile, 0, 0, POSIX_FADV_DONTNEED);
 
#endif
        regards, tom lane


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