We've been experiencing intermittently high I/O waits for some time on our server. Roughly once a week, I/O load will be high for a 12-18 hour period before returning to normal. The waits have a direct impact on the web server performance, mainly by slowing db writes. At this point, I've been through several rounds of optimization with the software vendor, and essentially exhausted that resource. They have a full breakdown of my hardware/VPS specs, and they say there's no reason I should have any resource problems. I've had several rounds of support tickets with KH techs, and I can honestly say that they've been more trouble than they were worth. I won't rehash those issues here, but will say that I think KH should be more careful about letting first-tier support techs with limited bash knowledge log into customer machines as root. Additionally, KH needs a better system of ticket escalation. That said, I'm still having problems and hopefully have a few simple questions: is there a problem with the server hosting my VPS? Is there a combination of VPS clients on that machine (mine included) that occasionally exceed the disk I/O capabilities of the host machine? If the host machine checks out, would I benefit instead from upgrading to a hybrid VPS?