ZaiPower's Journal: Update from Apache 1.3 to Apache 2.0?

Hello:

I write this letter for asking you (and share knowledge about) your experiences at the time of migrating from Apache 1.3 to Apache 2.0 in production environments.

In my enterprise we have a few projets (most in PHP and a very little number in Perl) running in Apache 1.3. Now we are thinking in upgrading the web server (only the web server, the PHP version would be the same, PHP 4).

PHP doesn't recommends using multi-thread servers so for Apache 2 you have use the MPM "prefork" (here there is a good explanation about MPM).

In this forum "Grunt" tells that with MPM "prefork" he does not obtain a performance gain and he has had some compatibility problems.

We have to maintain the compatibility and, off course, don't break anything!

In your experience have had you a performance gain in migrating from Apache 1.3 to Apache 2.0 - prefork? Would you recommend it? Any compatibility problem?