2 x ESXi hosts on IBM System X3550 Hardware - CPU Spike on the hour every hour
Posted on 2015-02-17
we have 2 ESXi hosts running 4 VMs each
the hardware in both hosts consists of:
6 x 2.26 GHZ Processors
The storage is:
IBMv3700 connected by ISCSI
Every hour on the hour the 2 hosts experience a spike in CPU which causes all servers to also experience high CPU. This is, unsurprisingly, most noticeable on the RDS server.
I've checked for scheduled tasks and the like on the Windows VMs ( it doesn't affect the vCenter VA ) and cannot see a regular pattern. There is no backup, AV, tasks, etc running to this schedule.
The fact that it happens on both hosts is quite bizarre.
There is a 50/50 split in VMs across the hosts. Configured as follows:
When viewing the performance tab within vSphere, we see an identical pattern on VMs as the hosts.
Any help would be greatly appreciated.