I’ve saved every email I’ve ever sent or received for some years now. My PST-file is huge; well over 4GB!

I was wondering if I’m pushing the boundaries of Outlook with a pst-file of that size. I can remember that a 2GB pst-file used to be the limit but clearly that is no longer the case.

Should I be worried about data loss and performance issues with a pst-file of this size?

Will running AutoArchive optimize Outlook again and if so;
How often should I run AutoArchive to keep Outlook in tip-top shape?