CPU really High

[techie08]

Hi Everyone

About 2 hours ago, the CPU on th 2008r2 file server started to run really high (80-100%)

The process that seems to causing is "System" which is the NT Kernel & System

Any ideas? I haven't yet done a reboot.

Thanks

[glennda]

open some kind of process monitor - could be something like hardware intercepts - no failed disks in the raid?

[techie08]

open some kind of process monitor - could be something like hardware intercepts - no failed disks in the raid?

Hi Glennda

The server is a VM.

[glennda]

what hypervisor?

[techie08]

what hypervisor?

Its VMware VSphere

[glennda]

Its VMware VSphere

ahh okay if it was KVM i knew there was a problem - with high hardware intercepts

I would still check a process monitor as it will tell you which parts of the system process are using the high cpu loads

also any event log entries?

[techie08]

There are loads of 2012 srv warnings saying
"While transmitting or receiving data, the server encountered a network error. Occassional errors are expected, but large amounts of these indicate a possible error in your network configuration. The error status code is contained within the returned data (formatted as Words) and may point you towards the problem."

This has been happing for about 4/5 every day.

[glennda]

Well that event id says there is a problem with the Nic - but apart from that i don't use VMware anymore so can't help sorry

[jamesb]

Domain Controller with 2012 Errors and Connectivity Problems

Might be worth killing the vNIC, removing it and throwing in a new one. Also, are the VMWare tools fully up to date?

[salan]

We have this for about one hour a day on the two file servers but not the Dc's
Not got to the bottom of it yet. All the usual suspects proved innocent(AV,etc,etc).
Updated tools. redone nic and ever rebuilt the machines.

[localzuk]

Take a look at things like checksum offloading. I had an issue a while back with a VM having issues with that.

[techie08]

We have this for about one hour a day on the two file servers but not the Dc's
Not got to the bottom of it yet. All the usual suspects proved innocent(AV,etc,etc).
Updated tools. redone nic and ever rebuilt the machines.

My 2008r2 DCs are fine as well.

Are yours still having problems even with the rebuild?

[oxide54]

are your nic/vswitches vlan tagged / trunk ports?

[kevinbrd]

I find that many errors don't really influence system performance, depends on the error obviously......Reboot is the first thing I would have tried though, fixes most Windows issues in a hurry

[techie08]

I find that many errors don't really influence system performance, depends on the error obviously......Reboot is the first thing I would have tried though, fixes most Windows issues in a hurry

Im going to give that a go at the end of today.