I recall that earlier versions of CentOS 6 had some kind of problem related to the clock, but I thought 6.6 solved that problem. Also, please check that FreeSWITCH is being started with the -np switch, or at least NOT started with the -rp switch. Hope this helps. Bote From: Martin Tomczyk Sent: Thursday, 16 April, 2015 08:58 Subject: Re: [Freeswitch-users] nohz=off CentOS 6.6 needed? Thanks for getting abck. My mistake. Sorry, yes it is v1.4.18. but I doubt that it is directly associated to freeswitch. At least for now since the cpu went up after a strange case of IP issue on OS level. So my question is more a general one. Thank you Von: Michael Jerris Gesendet: Donnerstag, 16. April 2015 14:39 Betreff: Re: [Freeswitch-users] nohz=off CentOS 6.6 needed? Is it the same on 1.4.18? On Apr 16, 2015, at 5:23 AM, Martin Tomczyk <martin.tomczyk@legion.de> wrote: We are experiencing high cpu load after setting up a CentOS 6.6 (fully updated; kernel 2.6.32) with a stable 1.4.15 freeswitch on a vmware 5.1 esxi server. Is the nohz=off setting still applicable? Thanks a lot for any help. Much appreciated Kind regards Martin