Hi,
I am running SQL 2012 (11.0.6248) on a pair of Real Servers running on Win 2008 R2 SP1. SSRS runs on the secondary server (here called B). About a month after switching from RAID 10 to RAID 5 (on SSDs) because the need to add some space, the secondary server was running as primary after failing over to update the configuration. Suddenly, we started getting timeouts and we failed over to the primary server (A). The performance on the secondary server (B) eventhough was on a idle state, was terrible. We rebooted the server, but didn't fixed the problem. While installing SQL updates, suddenly performance improved and the server was back to normal. We had to install updates on the primary server to run the same version of SQL on both servers so we failed over and the secondary server (B) was again the primary. After 3 weeks, the same problem occured, performance suddenly went down, we had to fail over to A and B is running slow. Rebooted server, restarted SSRS, checked for running qeuries, but nothing seems to solve the issue on B. Any ideas what could be causing this server even on an Idle state to run slow? Usually in the past a fail over would have fixed the problem on both servers.
Any help would be really appreciated,
Thanks