Apache/ISA reverse proxy memory usage

Posted on 2006-06-05
Last Modified: 2012-05-05
I'm currently running Apache 2.x as a reverse proxy.  It's running on a Redhat AS3 server and the Apache RPM is configured to use MPM prefork.  All non-used modules are disabled and the only non-base module that gets any use is mod_rewrite to handle some complex redirection rules.  The server also does some SSL termination.

The memory footprint is around 3.5-4.0MB per httpd process.

I'm trying to find some information on the memory requirements for an equivalent ISA reverse proxy setup, but I'm having trouble locating useful information.

Can anyone give me some useful links and/or information on how ISA handles connections/memory.
Question by:Tintin
    LVL 51

    Expert Comment

    what's the problem with the task manager?
    Or use TaskInfo.
    LVL 48

    Author Comment

    I don't have an ISA proxy running at the moment.  The background is there are a bunch of M$ bigots who are keen to replace an Apache reverse proxy with ISA as they see ISA as solving all their problems.

    So what I'm looking for is any information as to how efficient (or not) ISA is running in reverse proxy mode.
    LVL 37

    Accepted Solution

    >> So what I'm looking for is any information as to how efficient (or not) ISA is running in reverse proxy mode.

    That is one of the jobs that it is designed to do.  Maybe ask the bigots to explain to you why ISA will do the job better for them.  Unless you are an apache bigot, then I'm sure that you will be able to make a proper assessment - erhm ;-)

    for my part, I always stick to the generaol rule of thumb "If it aint broke, don'f try to fix it" - so unless there is a pressing reason to migrate to ISA, I wouldn't do it.


    Write Comment

    Please enter a first name

    Please enter a last name

    We will never share this with anyone.

    Featured Post

    How your wiki can always stay up-to-date

    Quip doubles as a “living” wiki and a project management tool that evolves with your organization. As you finish projects in Quip, the work remains, easily accessible to all team members, new and old.
    - Increase transparency
    - Onboard new hires faster
    - Access from mobile/offline

    A web service ( is a software related technology that facilitates machine-to-machine interaction over a network. This article helps beginners in creating and consuming a web service using the ColdFusion Ma…
    In our day to day coding, how many times have we come across a necessity to check whether a URL is a broken link or not? For those of you that answered countless and are using ColdFusion like myself, then this article is for you.  It will show yo…
    Hi everyone! This is Experts Exchange customer support.  This quick video will show you how to change your primary email address.  If you have any questions, then please Write a Comment below!
    In this sixth video of the Xpdf series, we discuss and demonstrate the PDFtoPNG utility, which converts a multi-page PDF file to separate color, grayscale, or monochrome PNG files, creating one PNG file for each page in the PDF. It does this via a c…

    759 members asked questions and received personalized solutions in the past 7 days.

    Join the community of 500,000 technology professionals and ask your questions.

    Join & Ask a Question

    Need Help in Real-Time?

    Connect with top rated Experts

    14 Experts available now in Live!

    Get 1:1 Help Now