Large File Upload Problem with PHP3 & Apache

I'm having a problem uploading large files through a browser to a web server using PHP3 as a dynamically loadable module and Apache on a Red Hat Linux system. The problem is that when uploading large files, when the apache httpd process handling the upload grows to a size of around 8500000 bytes it aborts and PHP returns a userfile of "none." The problem isn't with my code since smaller files work fine. I've done some perusing of the archives and found that this is not an unusual problem with PHP because of the way its POST handler is implemented. However, there are some recommended work arounds .. unfortunately, these work arounds aren't working for me .. At this point, my theory is that either a PHP or Apache memory limit for the httpd process is being reached. By analyzing the httpd process in question via top I've determined that the procedure aborts when the httpd process grows to a size of approx 8,500,000 bytes. I've tried adding the directive: php3_memory_limit 20000000 in order to work around the problem if it is a PHP3 memory limit. phpinfo shows that the master limit is still ca. 8500000 and the local value is increased to the value set in the php3_memory_limit directive. Unfortunately, the scripts behavior does not change. Just in case the limit was due to Apache, I've tried adding this directive .. RMemLimit 20000000 This has no effect either. Any help appreciated .. Thanks Bryan