I'm currently having a fairly high load(sometimes up to 0.50) while my servers are completely idle. When I stop Wowza, the load drops back to 0.00.
This issue seems to be appearing only when using the new Ubuntu Server 12.04 LTS (64 bit). When I run Wowza on my desktop, the load stays around 0.00. I've followed the performance tuning guide, but without success, the issue also appears on a completely default installation.
The servers have new Intel quad cores with hyperthreading and 24GB RAM. The cpu is 99-100% idle at all times, memory usage is practically nothing, disk isn't used at all and the network isn't used except for some ssh traffic. The issue also appears on our testing virtual machines which have 1 core and 1GB each, the loads sometimes goes up to 2 on those machines, also while completely idle.
Am I overlooking something?
An strace of several(but not all) java threads results in spamming the following messages:
FUTEX_WAKE_PRIVATE, 1 = 0
FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 1 = -1 ETIMEDOUT (Connection timed out)
Although I have no idea if this could be the problem.