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Re: O_DIRECT setting

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
Cc: Neil Conway <neilc(at)samurai(dot)com>, Guy Thornley <guy(at)esphion(dot)com>,pgsql-performance(at)postgresql(dot)org
Subject: Re: O_DIRECT setting
Date: 2004-09-23 14:57:41
Message-ID: 26123.1095951461@sss.pgh.pa.us (view raw or flat)
Thread:
Lists: pgsql-performance
Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> writes:
> TODO has:
> 	* Consider use of open/fcntl(O_DIRECT) to minimize OS caching
> Should the item be removed?

I think it's fine ;-) ... it says "consider it", not "do it".  The point
is that we could do with more research in this area, even if O_DIRECT
per se is not useful.  Maybe you could generalize the entry to
"investigate ways of fine-tuning OS caching behavior".

			regards, tom lane

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