# To update every <interval> samples:
top -i <interval>

# To set the delay between updates to <delay> seconds:
top -s <delay>

# To set event counting to accumulative mode:
top -a

# To set event counting to delta mode:
top -d

# To set event counting to absolute mode:
top -e

# To not calculate statistics on shared libraries, also known as frameworks:
top -F

# To calculate statistics on shared libraries, also known as frameworks (default):
top -f

# To print command line usage information and exit:
top -h

# To order the display by sorting on <key> in descending order:
top -o <key>


# 常用，c表示显示完整command
top -H -d 1 -c

# 高亮列及运行进程 z x y
选择 shift+L/Rarrow 


# 排序
shift+m 内存排序
shift+p CPU排序