Sorry for posting this again and again, but I still experience this problem and there seems to be no way for me to solve it. I've got confirmation from others that this problem is not only mine, so please take the time to read this.
I've tried Apache 1.3 and 2.0, both on Linux 2.4. I've tried using suEXEC and not using suEXEC, and I even tried modules that stop script execution at a specific load average (tested with 1.00!) or number of processes (tested with 10!). But nothing seems to help in the following case:
I run PHP as CGI because I don't want to have world-readable scripts and mod_perchild is not ready yet. When I do a hard reload - i.e. reloading the same script for about 10 seconds continously which should open quite a lot of scripts - I can crash the server. PHP-CGI- processes become zombies, I get a load average of about 90 (!) and it can take up to 30 minutes until the system responds again. This happens even with the simplest PHP scripts like a phpinfo call, but Perl scripts make absolutely no problem.
The PHP developers say it's an Apache problem, the Apache developers say it's a PHP problem. So *PLEASE* take the time to review this one again - I'm helpless right now! :-( I know there must be a solution, because some providers run PHP as CGI without problems, but I don't know what it could be. :-(
Also see http://bugs.php.net/bug.php?id=28556&edit=1
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