[CentOS] C6 server responding extremely slow on ssh interactive

Fri Jan 30 21:40:47 UTC 2015
Patrick Bervoets <patrick.bervoets at psc-elsene.be>

Op 30-01-15 om 21:51 schreef Gordon Messmer:
> On 01/30/2015 12:32 PM, Patrick Bervoets wrote:
>> Before - in december - I never experienced it. But it's a server I tend
>> do leave alone, so I'm never very busy on a shell.
> Do you know what kernel you were running at the time?  It might be useful to see if reverting to that revision changes the symptoms.
before the problem: kernel.x86_64 0:2.6.32-504.el6
problem occured during kernel.x86_64 0:2.6.32-504.1.3.el6
actual kernel.x86_64 0:2.6.32-504.3.3.el6

But since there is already a new kernel waiting; I'm not sure what to do. I think I'll first upgrade & test.
If my maintenance window permits I'll test downgrading (but 3 updates...)

BTW I've got 3 other kvm-servers without this behavior (but they are completely different machines so not much to compare)