To know what takes your CPU,you can use "java -Xprof" to start the Java Process. It can give you a report what method takes most.
On Wed, Mar 14, 2012 at 2:08 PM, raghavendhra rahul < [email protected]> 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? > -- 此致敬礼颜开
