stefan.becker wrote:I thinnk you must get the hardware capable to your goal. There is no software trick to make it better.
True. At the same time, different operating systems handle resource scarcity better than others. Many commercial Unix distributions over the past 20 years ended up in front of paying customers who demanded stability as they replaced their mainframe MVS and VSE installations. Therefore, more stability was baked in. Some cutting edge Linux distributions go the other direction, focusing instead on packing many features into the OS. Windows historically has focused on the operator experience at the expense of stability and scalability. All operating systems fall somewhere in between the extremes.
Granted, with sufficient resources most operating systems can cope. They operating systems start to show their differences under resource allocation conflicts.
To the original poster: you might try different operating systems and set up some controlled tests. While I have little experience with Red Hat, I would not be surprised to learn that Red Hat generally does very well as an operating system for virtualizing OS instances. You might want to focus on operating systems that tend to be deployed in servers rather than workstations.
Good luck and please circle back to this thread to let the community know what you learned.
The main problem is CPU, when every VM gets at least 7-10% from host CPU, it begins to freeze. I worked with win OS only before, so looking for any idea - using Linux\Ubuntu will give productivity gain or not?