Firstly, I want to say Sorry for the slowness of the site and the errors being generated.
These are not AP related, but server related. We have raised the issue with the site hosting company.
AP is not putting much load on the server:
Uptime: 10 Days 5:19:35 Page generated in 17.43088 seconds with 37 queries [Server Load Averages (1:5:15) 3.23 : 3.06 : 3.53]
Loads of up to 20 are quite easily dealt with normally, so the issue is outside of AP. However, page generations of 17 seconds are not acceptable. We hope to have the hosting company look into this as a matter of urgency and hope to be able to give you further feedback, or good news soon!