Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 27 Dec 2001 02:42:22 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 27 Dec 2001 02:42:12 -0500 Received: from www.wen-online.de ([212.223.88.39]:5138 "EHLO wen-online.de") by vger.kernel.org with ESMTP id ; Thu, 27 Dec 2001 02:41:59 -0500 Date: Thu, 27 Dec 2001 08:42:31 +0100 (CET) From: Mike Galbraith X-X-Sender: To: "Stolle, Martin (KIV)" cc: linux-kernel Subject: Re: Informix 7.3 and Linux Kernel 2.4 In-Reply-To: <4353BABFDF95D311BFC30004AC4CB22AAE342A@sdar000001.kiv-da.de> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 27 Dec 2001, Stolle, Martin (KIV) wrote: > At first, Informix works quite well, but after a while, especially > after some traffic on the computer (reading the harddisk by "find", > do a "update statistics" under informix or some exports, the system > starts thrashing. > > I found out, that it starts thrashing with kswapd using 50% of processor > power and oninit using another 50%, when low memory runs short. (sounds like much zone_normal unfreeable creating persistant imbalance) > >From then, the system is very very slow. > The problem isn't so dramatic with kernel releases <=2.4.9, but with higher > releases, including 2.4.17, it is not tolerable. > 2.4.17 does not swap to disk, but is still very slow, but kswapd is always > active (without swapping to disk!). What does /proc/slabinfo look like with 2.4.17? (zillion buffer heads?) -Mike - 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/