Did not help.
But today I was on the server at this moment.
avg CPU usage was 50%. One CT with cpulimit 0.8 and cpuunits 8 start to use 100% of 1 core (see in top). load average was 200. When kill the process LA stay lower. Then again have high LA, and
NMI watchdog: BUG: soft lockup - CPU#5...