Return-Path: Delivered-To: apmail-new-httpd-archive@apache.org Received: (qmail 46910 invoked by uid 500); 22 Mar 2001 18:22:48 -0000 Mailing-List: contact new-httpd-help@apache.org; run by ezmlm Precedence: bulk Reply-To: new-httpd@apache.org list-help: list-unsubscribe: list-post: Delivered-To: mailing list new-httpd@apache.org Received: (qmail 46750 invoked from network); 22 Mar 2001 18:22:34 -0000 Date: Thu, 22 Mar 2001 13:20:53 -0500 (EST) From: Blue Lang To: cc: Subject: Re: Behavior Under Linux, Benchmarking Curves and Cry for Help In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Spam-Rating: h31.sny.collab.net 1.6.2 0/1000/N On Wed, 21 Mar 2001, Stanislav Rost wrote: > A little about the setup: two P2-400's stressing another P2-400 with > >400-500 concurrent ongoing downloads of large files at any given > instant of time (so high concurrency levels are implicit). Apache is > directed to create at least that many threads on startup. how large are the files? what version of apache are you using? why are you using http to transfer large files? it's stinky at it. if it's a 1MB file, you're out of bandwidth in .002 seconds (on a 100Mb link) and apache will queue up the rest of your downloads and wait, wait, wait. > My other question is for anyone who has ever successfully benchmarked > Apache under Linux and produced nice-looking graphs: what system and > web server parameters did you tweak to obtain high-stress results? > What was your setup? i've been able to maintain load avgs of around 230 on a late 2.3 kernel on a celeron 433, pushing about 1300 reqs/second over a 100Mb switch. i was using ab and a smallish (~3k) index.html. the only things i did were turn off logging and set max clients to 255. i was experimenting with serving files from RAM disks and loopback mounted file systems at the time, it was nothing scientific. anyways, that's 1,000,000 small requests every 10 minutes or so. this was probably with apache 1.3.12 or so. on a really nice switch with a dual proc sun Netra, i was able to get really close to 11MB/sec from an apache install tuned pretty much the same way with very, very low load on the web server. -- Blue Lang http://www.gator.net/~blue 2315 McMullan Circle, Raleigh, North Carolina, USA 919 835 1540