sounds like your cpu is blocked waiting on your disks. What does your cluster look like? how many cores per node? how many spindles?
On Mar 14, 2012, at 1:08 AM, raghavendhra rahul wrote: > Hi, > I m running coprocessor aggregation for some million rows. When > execution cpu is waiting for IO for long time and doesn't give the result. > The ganglia cpu status shows that 25% is utilized for user process and 50% > is waiting for IO. No other process is running at that time. What might be > the problem?
