memory issues

This link certainly saved me some time in evaluating the memory cost of modules and the core of Drupal 5 and 6.

There are a few shortcomings with PHP5, but not so many. One of them, though, is that memory limits are a bit tricky to handle. We don't handle them very well in Dokeos either, so the results of experiencing a memory limit in Dokeos is this: Yes, nothing. That's generally what you would end up with. So if you want to make sure Dokeos can handle pretty much every kind of thing you would want it to do, you would be wise to put a memory limit of at least 8MB in your php.ini file.