Our servers are hardened with a process memory restriction. A soft limit is set to 256 MB and a hard limit set to 300 MB. When a script uses over 300 MB of server RAM, it will show a 500 error. This restriction only applies for PHP and CGI scripts. Running a image file or static file shouldn't have any problem with this. After lots of analysis, we have found that, most of the scripts without any bugs works fine within the memory limit specified. If your script is not working, we highly suggest to optimize it and reduce the memory usage to run on our server. This restriction is purely applied to avoid sudden server load by a buggy php scripts.
