Return-Path: Delivered-To: apmail-httpd-dev-archive@www.apache.org Received: (qmail 93978 invoked from network); 12 Nov 2008 08:41:44 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (140.211.11.2) by minotaur.apache.org with SMTP; 12 Nov 2008 08:41:44 -0000 Received: (qmail 82606 invoked by uid 500); 12 Nov 2008 08:41:48 -0000 Delivered-To: apmail-httpd-dev-archive@httpd.apache.org Received: (qmail 82543 invoked by uid 500); 12 Nov 2008 08:41:48 -0000 Mailing-List: contact dev-help@httpd.apache.org; run by ezmlm Precedence: bulk Reply-To: dev@httpd.apache.org list-help: list-unsubscribe: List-Post: List-Id: Delivered-To: mailing list dev@httpd.apache.org Received: (qmail 82534 invoked by uid 99); 12 Nov 2008 08:41:48 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 12 Nov 2008 00:41:48 -0800 X-ASF-Spam-Status: No, hits=-0.0 required=10.0 tests=SPF_HELO_PASS,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: domain of minfrin@sharp.fm designates 72.32.122.47 as permitted sender) Received: from [72.32.122.47] (HELO chandler.sharp.fm) (72.32.122.47) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 12 Nov 2008 08:40:28 +0000 Received: from chandler.sharp.fm (localhost [127.0.0.1]) by chandler.sharp.fm (Postfix) with ESMTP id 0512D13000C for ; Wed, 12 Nov 2008 02:41:11 -0600 (CST) Received: from 87-194-125-20.bethere.co.uk (87-194-125-20.bethere.co.uk [87.194.125.20]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) (Authenticated sender: minfrin@sharp.fm) by chandler.sharp.fm (Postfix) with ESMTP id 16164130002 for ; Wed, 12 Nov 2008 02:41:09 -0600 (CST) Message-ID: <491A96A3.5060805@sharp.fm> Date: Wed, 12 Nov 2008 10:41:07 +0200 From: Graham Leggett User-Agent: Thunderbird 2.0.0.17 (Macintosh/20080914) MIME-Version: 1.0 To: dev@httpd.apache.org Subject: Re: Simple MPM is in trunk References: <4906BB73.9040407@force-elite.com> In-Reply-To: Content-Type: multipart/signed; protocol="application/x-pkcs7-signature"; micalg=sha1; boundary="------------ms090206010300090002030706" X-Virus-Scanned: ClamAV using ClamSMTP X-Virus-Checked: Checked by ClamAV on apache.org This is a cryptographically signed message in MIME format. --------------ms090206010300090002030706 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit harish kulkarni wrote: > We are planning to use apache in forward proxy mode, but in case the > server response has latency of 2+secs.. we see that to support high > traffic say 5K/sec we require huge number of threads. We see a huge CPU > usage... > Just to take an example to support 3K req/secs we have to have 3K+ threads. > > Is there some thing wrong in our configuration ? Please suggest us if we > have to do any changes in confirguration and just wanted to know using > apache as forward proxy with high request rate as we are talking about > would be a good choice?. > > we are using single process model with event_mpm. > > But when we run the same load on lighty we see good performance. > > Is simple MPM is going to add any good value to help get good > performance from apache?. Is it going to true event driven model?. What happens we you try the worker and/or prefork MPMs, but with all the modules you don't need turned off? (In other words, remove all LoadModule lines and turn back on the ones you need only). I can imagine that for a forward proxy, you could turn off almost everything. Threads in themselves aren't expensive, but all the request processing that Apache can do will be expensive if it is there but you're not using it. 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