After upgrading to 3.4 and passing the 50 system limit we're now having a hard time keeping all of the systems in a state where cloudmin can talk to webmin. Quite frequently we see this:
Last status Webmin down (Checked at 18/Nov/2009 12:05)
Detailed status error Failed to get status from Webmin in 30 seconds
The problem is that for Xen Dom0's it means that we can't create any hosts on them and for DomU's it means that no statistic collection is happening.
Load is fairly high on the cloudmin system (weekly average of 1.48) and before I simply start throwing more resources at it I thought I would check in with you for possible solutions. Send me an email if you'd like access via SSH or Webmin otherwise if you have any questions let me know.