On Jan 18, 2008, at 4:37 AM, Fredrik Lindgren wrote: I have been messing around with the excellent "iostat-ms" tool in an effort to understand what is going on with our machines that are showing lots of IOwait.Below are two 15 second samples, the first one is taken during peak and the second one during the night. The obvious difference is in the "exe" field. Please excuse my ignorance, but what do