I am using a Macbook Pro, 2 years old. 8GB RAM, generally hard working machine. If I restart it once a month it's a lot.
Since this morning it began locking up intermittently - whichever application I was in would stop responding for around 5 to 20 seconds (up to 30 seconds at time). All I get in the app is the spinning color wheel. I still (usually) have the ability to tab around and take a look at activity monitor, but the app I was in won't respond. The lockups happen in all apps, not just the browser window.
I killed all the usual suspects in an effort to track down the offending app or process, and have had no success.
A couple of restarts later, I have removed almost everything that runs in the background and it's still happening. I initially thought it was chrome, but it happens with safari as well.
There is nothing unusual in the console or system log, and the only visible change is if activity monitor is open, it shows a large spike in IO/sec immediately after the system unlocks. Running top on the command line reveals nothing unusual. Nothing has been installed on the machine in the last few days.
any ideas what I can use to track down the offending process or activity?