From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Wed, 7 Mar 2001 08:25:19 +0100 (CET) From: Mike Galbraith Subject: Re: Linux 2.2 vs 2.4 for PostgreSQL In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org Return-Path: To: Matthew Kirkwood Cc: linux-mm@kvack.org, Rik van Riel List-ID: On Tue, 6 Mar 2001, Matthew Kirkwood wrote: > Draw your own, but: > * 2.4's IO scheduling doesn't seem as good as 2.2's yet > * But it's getting better > * Mike's patch was about 3-5% worse on this workload > with fsync on and 3% better with it off (except on > one run, which I think may be an anomaly) Just looking at the 2.4 numbers: My adjustment is a rob Peter to pay Paul tradeoff. I'm glad Peter didn't get seriously injured during the mugging ;-) Looking at 2.4.2p2->2.4.2ac11+fix, there's still a gain for this load. I see more of a net gain with my load though. Flattening the ac11 peak for this load raised the valley for another type load such that both gained some in the end. I'd really like to hear from the folks who were griping about their workstation performance though to see if the compromise was a good one for them.. or not. So far, I've heard nothing either positive or negative. -Mike -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux.eu.org/Linux-MM/