In win2k3sp2, I've never seen this before and have not installed anything recently, but seemingly out of nowhere, the System process (not the idle process) is taking a lot of CPU whenever anything else is. That is, sitting idle, it's at 0. If I go and start a program like Thunderbird, while loading, thunderbird.exe and System will be competing for CPU usage, sometimes with System getting more than 50% (it's a dual-core system). I look at the total CPU time column, and System ranks sixth, just below SQL Server! This has never been the case before.
1) This is bad, right? 2) What's causing it?
I thought it might be the RAID, but that's a separate process, and the config util isn't reporting anything wrong.
I'm tempted to reset the server, but it's in production, so I'd rather not at the moment unless I'm sure it will do more good than harm. Also, I don't feel like it's "due for a reset," since it's only had thirteen days' uptime.