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Effects of setting linux block device readahead size

From: "Mark Wong" <markwkm(at)gmail(dot)com>
To: "pgsql-performance(at)postgresql(dot)org" <pgsql-performance(at)postgresql(dot)org>
Cc: "Gabrielle Roth" <gorthx(at)gmail(dot)com>, "Selena Deckelmann" <selenamarie(at)gmail(dot)com>
Subject: Effects of setting linux block device readahead size
Date: 2008-09-10 06:53:17
Message-ID: (view raw or whole thread)
Lists: pgsql-performance
Hi all,

I've started to display the effects of changing the Linux block device
readahead buffer to the sequential read performance using fio.  There
are lots of raw data buried in the page, but this is what I've
distilled thus far.  Please have a look and let me know what you



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