Hello Thomas,
If you can't provide us with the access, there is no way for us to troubleshoot this. We don't face any load issues on our local instances and we even have Komento running on our main site at
http://stackideas.com/blog and we don't have any load issues at all. The servers has been running fine for the past couple of years without having any performance issues. I guess it depends on the set of data that you have on the site and how we can fine tune this for you.