From mboxrd@z Thu Jan 1 00:00:00 1970 Received: by py-out-1112.google.com with SMTP id f31so2348064pyh for ; Thu, 23 Aug 2007 22:27:37 -0700 (PDT) Message-ID: Date: Thu, 23 Aug 2007 22:27:36 -0700 From: mike Subject: Re: Drop caches - is this safe behavior? In-Reply-To: <46CE69DE.9040807@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <46CE3617.6000708@redhat.com> <1187930857.6406.12.camel@norville.austin.ibm.com> <46CE69DE.9040807@redhat.com> Sender: owner-linux-mm@kvack.org Return-Path: To: Chris Snook Cc: Dave Kleikamp , linux-mm@kvack.org List-ID: On 8/23/07, Chris Snook wrote: > Mike -- > > Try Dave's suggestion to increase vm.vfs_cache_pressure. drop_pages > should never be needed, regardless of which caches you're dropping. > > -- Chris > thanks all. i will try it on one of the machines and see how it performs. this is an opteron 1.8ghz (amd64), ubuntu, latest stable linux kernel, 3 gigs of ram (just FYI) - SATA disk. i thought i'd do it every 5 minutes not because of a horrible memory leak that fast, but figured "why not just free up all RAM as often as possible" when you said "sar" are you talking about this: atsar - system activity reporter Description: system activity reporter Monitor system resources such as CPU, network, memory & disk I/O, and record data for later analysis -- 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