From owner-freebsd-stable Thu Jun 7 14:51:30 2001 Delivered-To: freebsd-stable@freebsd.org Received: from guru.mired.org (okc-65-26-235-186.mmcable.com [65.26.235.186]) by hub.freebsd.org (Postfix) with SMTP id 5890E37B403 for ; Thu, 7 Jun 2001 14:51:26 -0700 (PDT) (envelope-from mwm@mired.org) Received: (qmail 56186 invoked by uid 100); 7 Jun 2001 21:51:25 -0000 From: Mike Meyer MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <15135.63325.343370.528294@guru.mired.org> Date: Thu, 7 Jun 2001 16:51:25 -0500 To: "Karsten W. Rohrbach" Cc: freebsd-stable@FreeBSD.ORG Subject: Re: building apache from /usr/ports In-Reply-To: <20010607183358.N59617@mail.webmonster.de> References: <20010605140629.B15206@leviathan.inethouston.net> <20010605152718.A21889@localhost> <20010606034917.D97958@mail.webmonster.de> <15133.37451.23934.758674@guru.mired.org> <20010606113119.B54034@brel.com> <15134.26898.890143.63429@guru.mired.org> <20010607183358.N59617@mail.webmonster.de> X-Mailer: VM 6.90 under 21.1 (patch 14) "Cuyahoga Valley" XEmacs Lucid X-face: "5Mnwy%?j>IIV\)A=):rjWL~NB2aH[}Yq8Z=u~vJ`"(,&SiLvbbz2W`;h9L,Yg`+vb1>RG% *h+%X^n0EZd>TM8_IB;a8F?(Fb"lw'IgCoyM.[Lg#r\ Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Karsten W. Rohrbach types: > Mike Meyer(mwm@mired.org)@2001.06.06 12:32:02 +0000: > > Calvin NG types: > > > Correct me if I m wrong. > > > For in-core web server , every copy of server loaded has the perl and/or php > > > in it. For modules, its a shared library, the server is smaller size, and only > > > a copy of the module is loaded in memory. > > > > That's all correct. However, it wouldn't surprise me if the server + > > module is larger than the server with an in-core module. Since there's > > no reason to have more than one copy of the server loaded - even for a > > high-load server - there's still only one copy of the module > > loaded. Since everything shared in the module should also be shared > > with the in-core version, the total memory usage won't be very > > different. > it is, since apache is not multithreaded (1.x). so, on a heavily loaded > box you got "several" process images in mem, thus more overhead. But that's also true for a shared library. A heavily loaded server will have "several" process images in memory, thus the same overhead. The question is - what part of the shared library version is going to be shared between processes that isn't also shared if the module is compiled in-core. All the code is shared in both cases. Data should be COW in both cases. What's left? http://www.mired.org/home/mwm/ Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message