CPU drop / Latency Spike on Windows servers causes disconnect
Posted on 2014-08-20
I have a long time problem but cannot find a solution, even after opening tickets with both VMware and Microsoft.
We first found this issue with DFS on a Win 2003 server, but now, we are finding it on an SQL server causing a disconnect.
Server environment includes boot from SAN and all of our disks are SAN based. The file server has 4GB RAM and 1 processor. The SQL server has 8GB RAM and 4 CPU.
Disk speed has been upgraded to flash as a test, but this hasn't solved the problem.
We also have a stretched cluster providing a mirrored environment through an IBM SVC implementation.
Logs have no indication of what is causing the spike in latency and the drop in CPU. We have McAfee and Altiris installed, and our backup agent installed is Avamar. To isolate, we have tried removing everything from these boxes.
Any thoughts in helping to identify this issue will be greatly greatly appreciated.