Why I am saying this? Because I am getting a bit tired of the incorrect posts about this on various blogs, forums and IRC channels related to the major Python web frameworks and other Python topics. I really wish you guys would do your research properly before commenting on something you don't really know much about.
Especially those answering questions on the IRC channels, it would also be really good if you at least read the mod_wsgi documentation. It gets very frustrating to keep seeing posts in the IRC logs where you give out incorrect information about usage of mod_wsgi. As to people asking the questions, please go and read the documentation on the actual mod_wsgi web site, especially where someone does provide a link to some specific part of it by way of an answer, rather than just believing that someone else's one line answer is all there is to know or even correct. Why if you have a mod_wsgi question you can't just go to the mod_wsgi mailing list in the first place I have no idea.
And since I am having a rant, also stop using the term WSGI to generically refer to mod_wsgi running on Apache. WSGI is a specification of an API for Python web applications. The mod_wsgi module for Apache is just one implementation of the WSGI specification, and a lot more besides, for the Apache web server. The mod_wsgi module for Apache is not the only implementation of the WSGI specification in respect of providing a hosting solution, both generally and for Apache. It gets really confusing some times when you use the term WSGI in isolation when talking about a specific hosting mechanism as one doesn't know what hosting mechanism you are actually talking about even though most of the time it is mod_wsgi for Apache that you mean.