Finallly I found where it stucked.
Last thing that written on screen is
Repair unmerged shares
Starting ...
3502/58276 [=>--------------------------] 6%
After that it do nothing. I look with top command and from VMware Client performance tab - VM is do NOTHING it simply stuck, but not OS itself just ./occ upgrade script - the system is totally responsive and even another site in same apache2 instance is working ok