http://www.osnews.com/story/18640/Serverwide_Performance_Benchmarking Exploring the Future of Computing en-us Copyright 2001-2009, David Adams adam+nospam@osnews.com Mon, 09 Nov 2009 07:31:06 GMT http://www.osnews.com/images/osnews.gif http://www.osnews.com http://osnews.com/thread?272697 http://osnews.com/thread?272697 Readahead and IO scheduler also make a lot of difference in performance. I don't use databases, only desktop, but I found useful performance tips in RedHat, Postgresql, and IBM documents. Right now I'm using JFS with the deadline IO scheduler and I'm impressed. It got even better after setting readahead to 1024.

Most database performance documents show that the deadline scheduler makes a lot of difference in throughput, and on benchmarks explicity using deadline JFS was almost allways the best. It's not EOL'd as some believe, last release is dated 2007-08-24.

Try this in any filesystem and you'll see the difference:
echo deadline > /sys/block/sda/queue/scheduler
echo 1024 > /sys/block/sda/queue/nr_requests
echo 250 > /sys/block/sda/queue/iosched/read_expire

Bruno Wed, 19 Sep 2007 23:54:00 GMT donotreply@osnews.com (bilu) Comments