Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261971AbVBAK0s (ORCPT ); Tue, 1 Feb 2005 05:26:48 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261858AbVBAK0s (ORCPT ); Tue, 1 Feb 2005 05:26:48 -0500 Received: from ns.virtualhost.dk ([195.184.98.160]:24454 "EHLO virtualhost.dk") by vger.kernel.org with ESMTP id S261968AbVBAK0l (ORCPT ); Tue, 1 Feb 2005 05:26:41 -0500 Date: Tue, 1 Feb 2005 11:26:38 +0100 From: Jens Axboe To: "Catalin(ux aka Dino) BOIE" Cc: linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org Subject: Re: Strange vmstat output. 2.6.10 Scheduler? Message-ID: <20050201102638.GJ4137@suse.de> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2581 Lines: 69 On Tue, Feb 01 2005, Catalin(ux aka Dino) BOIE wrote: > Hello! > > I have a weird problem with a server. I use deadline. > The output of vmstat is: > 1 1 12312 6064 7580 815432 0 0 5332 456 1263 3119 22 5 0 > 73 > 0 1 12312 5280 7584 816240 0 0 6204 620 1307 1530 15 4 0 > 81 > 0 1 12312 6096 7528 815088 0 0 7604 8732 1256 1398 5 8 0 > 87 > 0 1 12312 6048 7528 815144 0 0 8 8 1243 1440 14 2 0 > 84 > 0 1 12312 6048 7528 815168 0 0 0 0 1261 1287 8 2 0 > 90 > 0 2 12312 6040 7584 815184 0 0 0 0 1258 1197 7 2 0 > 91 > 0 2 12312 6024 7584 815208 0 0 0 0 1265 1309 6 5 0 > 89 > 0 2 12312 6024 7584 815208 0 0 0 136 1253 365 2 2 0 > 96 > 0 2 12312 5984 7584 815208 0 0 0 0 1268 413 2 1 0 > 97 > 0 2 12312 6052 7584 815208 0 0 0 0 1270 375 2 1 0 > 97 > 1 0 12312 6164 7584 815156 0 0 6188 288 1270 4314 23 5 0 > 72 > 0 1 12312 5684 7536 815592 0 0 4128 8656 1270 1316 14 3 0 > 83 > 0 1 12312 5684 7536 815608 0 0 0 0 1258 1251 8 3 0 > 89 > 0 1 12312 5552 7536 815628 0 0 0 0 1258 1327 8 2 0 > 90 > 0 1 12312 5552 7536 815644 0 0 0 0 1264 1127 7 2 0 > 91 > 0 1 12312 5552 7536 815668 0 0 0 2 1258 1225 8 3 0 > 89 > 0 3 12312 5248 7588 816108 0 0 4340 585 1249 1316 7 3 0 > 90 > 0 2 12312 5612 7584 815680 0 0 3092 188 1254 411 3 1 0 > 96 > 0 2 12312 5564 7584 815676 0 0 0 0 1261 259 2 2 0 > 96 > 0 2 12312 5564 7584 815676 0 0 0 0 1254 348 2 1 0 > 97 > > It seems strange because iowait is at 90% but nothing is trasnfered > to/from disk. Why is that? The bi/bo numbers are sometimes a little confusing, it doesn't mean that the drive is actually doing 8656kb of io at that very second - only that this much io was queued to the drive. > I run postgresql on this server and I'm not satistied by it's speed. > > Single Pentium IV, IDE disk. > > What can be the problem? Do you have write cache enabled on the drive? -- Jens Axboe - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/