fix bug
fix bug
change time interval of get_instance_data_of_cpu
fix bug
add chart at monitoring tab
show data works well
make chart looks better
fix time
Change the way of data
add mem chart
fix js bug
fix bug
make chart beautiful
change style of time
fix bug
let cpu chart accurate to two decimal place
add blk data
change data format of blk_data
addd blk and nic data
fix list assign bug