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Ubuntu 14.04 Mitaka after last upgrade very slow

Some time ago I create OpenStack farm. Ubuntu 14.04 + Mitaka + It works fine until last upgrade. After upgrade I saw so in nova.log on nodes: 2020-03-25 15:39:01.743 14944 WARNING nova.virt.libvirt.driver [req-be8722b3-2a69-4400-a02f-75b6d7abddc9 - - - - -] couldn't obtain the vcpu count from domain id: 01c96ead-67b1-4eb6-89da-994a2437bb8e, exception: Requested operation is not valid: cpu affinity is not supported Virtual Machines randomly time delayed before starting. Time of delay may be one minute, but sometime days. Migrating of virtual machines stay slow and sad.

Sadly is I found it too late, previous backups already absent.