Timeout when saving model in django admin page

Hi!

When saving the model over the admin page of Django, a lot of processing is done (in pre_save function) which takes several minutes. After a while I get a timeout, although the process is still running in the background.

How can I avoid to get this timeout?

Another nice thing would be to show the progress of the saving process, may be with a progress bar. Do you have any ideas/hints/links on how to do that?

Thank you in advance!

Steffen