From owner-freebsd-hackers Tue Mar 20 10:27: 9 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from peorth.iteration.net (peorth.iteration.net [208.190.180.178]) by hub.freebsd.org (Postfix) with ESMTP id 94F8237B718; Tue, 20 Mar 2001 10:27:03 -0800 (PST) (envelope-from keichii@peorth.iteration.net) Received: by peorth.iteration.net (Postfix, from userid 1001) id 1DF5A5928B; Tue, 20 Mar 2001 12:23:50 -0600 (CST) Date: Tue, 20 Mar 2001 12:23:50 -0600 From: "Michael C . Wu" To: Matt Dillon Cc: "Michael C . Wu" , izero@ms26.hinet.net, cross@math.psu.edu, Alfred Perlstein , grog@FreeBSD.ORG, fs@FreeBSD.ORG, hackers@FreeBSD.ORG Subject: Re: tuning a VERY heavily (30.0) loaded scerver Message-ID: <20010320122350.F52586@peorth.iteration.net> Reply-To: "Michael C . Wu" References: <20010320111144.A51924@peorth.iteration.net> <20010320092717.R29888@fw.wintelcom.net> <20010320113818.B52586@peorth.iteration.net> <20010320120112.C52586@peorth.iteration.net> <200103201815.f2KIFR594803@earth.backplane.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <200103201815.f2KIFR594803@earth.backplane.com>; from dillon@earth.backplane.com on Tue, Mar 20, 2001 at 10:15:27AM -0800 X-PGP-Fingerprint: 5025 F691 F943 8128 48A8 5025 77CE 29C5 8FA1 2E20 X-PGP-Key-ID: 0x8FA12E20 Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Tue, Mar 20, 2001 at 10:15:27AM -0800, Matt Dillon scribbled: | | :Another problem is that we have around 4000+ processes accessing | :lots of SHM at the same time.. | | How big is 'lots'? If the shared memory segment is smallish, e.g. | less then 64MB, you should be ok. If it is larger then you will | have to do some kernel tuning to avoid running out of pmap entries. This is exactly what happens to us sometimes. We run out of pmap entries. :) But what can we tune? -- +-----------------------------------------------------------+ | keichii@iteration.net | keichii@freebsd.org | | http://iteration.net/~keichii | Yes, BSD is a conspiracy. | +-----------------------------------------------------------+ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message