system monitoring tool
dstat command: system resource statistics, instead of vmstat, iostat
dstat [-afv] [options..] [delay [count]]
-c: Display cpu related information
-C #,#,...,total
-d: Display disk related information
-D total,sda,sdb,...
-g: Display page related statistics
-m: Display memory related statistics
-n: Display network related statistics
-p: Display process related statistics
-r: Display statistics related to io requests
-s: Display swapped related statistics
Common commands
dstat - -top -cpu displays the processes with the highest system CPU usage