From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail203.messagelabs.com (mail203.messagelabs.com [216.82.254.243]) by kanga.kvack.org (Postfix) with SMTP id 14C096B004D for ; Tue, 24 Mar 2009 04:36:27 -0400 (EDT) Received: from localhost (filter1.syneticon.net [192.168.113.83]) by mx03.syneticon.net (Postfix) with ESMTP id EAFA535D73 for ; Tue, 24 Mar 2009 09:42:24 +0100 (CET) Received: from mx03.syneticon.net ([192.168.113.84]) by localhost (mx03.syneticon.net [192.168.113.83]) (amavisd-new, port 10025) with ESMTP id HtzS20fabd4g for ; Tue, 24 Mar 2009 09:42:20 +0100 (CET) Received: from [192.168.10.145] (koln-4db483fa.pool.einsundeins.de [77.180.131.250]) by mx03.syneticon.net (Postfix) with ESMTPSA for ; Tue, 24 Mar 2009 09:42:20 +0100 (CET) Message-ID: <49C89CE0.2090103@wpkg.org> Date: Tue, 24 Mar 2009 09:42:08 +0100 From: Tomasz Chmielewski MIME-Version: 1.0 Subject: why my systems never cache more than ~900 MB? Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org To: linux-mm@kvack.org List-ID: On my (32 bit) systems with more than 1 GB memory it is impossible to cache more than about 900 MB. Why? Caching never goes beyond ~900 MB (i.e. when I read a mounted drive with dd): # free total used free shared buffers cached Mem: 2076164 966788 1109376 0 855132 68932 -/+ buffers/cache: 42724 2033440 Swap: 2097144 0 2097144 Same behaviour on 32 bit machines with 4 GB RAM. No problems on 64 bit machines. I have one 32 bit machine that caches beyond ~900 MB without problems. Is it some kernel/proc/sys setting that I'm missing? -- Tomasz Chmielewski http://wpkg.org -- 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-mm.org/ . Don't email: email@kvack.org