[CentOS] bizarre system slowness

Thu Apr 14 09:37:02 UTC 2011
Michael Simpson <mikie.simpson at gmail.com>

On 13 April 2011 21:06, Florin Andrei <florin at andrei.myip.org> wrote:
> Running v5 64bit on a Dell 1950.
> /var/log/messages was full of "ntpd[7313]: frequency error -1707 PPM
> exceeds tolerance 500 PPM" messages. There was a lot of messages about
> "the system limit for the maximum number of semaphore sets has been
> exceeded"; there was indeed a lot of leftover semaphores created by NRPE
> (owned by the nagios user); I deleted them but nothing has changed, so
> they were a symptom, not the cause.

Sounds as though something in software is leaking semaphores rather
than having them cleared up. Are you using intel nics as if you are
you might want to check if you have e1000 dkms rpm installed. No idea
why it shoud only affect 1 box if they are all the same