Sorry for disturbing again, after the restart I've seen that I'm unable to ssh to VM since on login they run byobu which now hangs (never did on VM).
I managed to ctrl-c fast enough to don't start byobu and an strace on it gave me this: http://pastebin.com/raw.php?i=KYMbsxKV Thanks Best Regards -- Alessandro Tagliapietra alexfu.it (http://www.alexfu.it) Il giorno lunedì 25 febbraio 2013, alle ore 17:51, Alessandro Tagliapietra ha scritto: > Hi Eduardo > > Thank you for the tips. > > I'll wait a few days and let you know when this happens again. > > About the load, system cpu wasn't more then 10% used from top, io wait was at > 2% most of the time. > > We've 4 x 2 (HT) cores on the server and a total number of 19 vcpu allocated > on VM running on that host. > > Vm runs mostly nginx+php-fpm+mysql, one runs also rabbitMQ and a python > rabbitMQ consumer. > > I'll let you know later then. > > Thanks again! > > Best > > -- > > Alessandro Tagliapietra > alexfu.it (http://www.alexfu.it) > > Il giorno lunedì 25 febbraio 2013, alle ore 16:44, Eduardo Damato ha scritto: > > > > > > Hi Alessandro, > > > > Thanks for the information. > > > > The sysrq-t that I requested is *only* useful during the problem. Please > > do that when you encounter the problem again. > > > > It may be that you are overcommitting cpus on your system by having many > > virtual machines running on the nova controller node. This is a > > completely wild guess, but I would recommend you to look at how many > > cpus you have and how many virtual machines and if you have any > > processes in real time or sched FIFO. > > > > Cheers, > > Eduardo. > > > > > > > >
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