I have subj. And it working good till yesterday. But yesterday boot and work became too slow. I checked disks - ok. Swap file - exist and equal RAM. CPU (top in console) not loaded more then 13-15%. VirtIO installed. And I sign one strange thing. If some soft one time was loaded it next time run good. What the problem? I didn't nothing 
And I am newbie. Help me anyone?
And I am newbie. Help me anyone?