Updatte - an hour after I spotted the problem, it just went away, I did nothing.
If you know what are the reasons for this problem pls let me know.
you can contact me here or on twitter at @my_sublime
I have been Contracted to convert an existing website to Drupal. I was hired as the developer but the Company is asking me to help size the servers that will be needed.
This post is mostly market research, since we are considering starting with high end PHP hosting. We have ideas and skills to make a "PHP cloud" that can serve almost any Drupal installation with the no_anon module enabled and a special module provided by us to allow serving millions of page views for anonymous users. We plan to provide memcache and NDB mysql table engine.
You pay for how many server instances you need to run plus bandwidth and storage.