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2015年3月18日 星期三

Find out biggest cpu/memory consuming processes with ps command

http://www.math-linux.com/linux/tip-of-the-day/article/find-out-biggest-cpu-memory-consuming-processes-with-ps-command

Biggest memory consuming processes

root@kali:~# ps -eo pmem,pcpu,pid,args | tail -n +2 | sort -rnk 1 | head

 1.8  0.0  3304 gnome-panel

 1.3  0.2  3365 /usr/lib/vmware-tools/sbin64/vmtoolsd -n vmusr --blockFd 3

 1.3  0.0  3370 nautilus -n

 1.2  0.3  2642 /usr/bin/Xorg :0 -br -verbose -novtswitch -auth /var/run/gdm3/auth-for-Debian-gdm-0vVbZF/database -nolisten tcp vt7

 1.0  0.1  3468 gnome-terminal

 0.9  0.0  3377 nm-applet

 0.8  0.0  3371 gnome-screensaver

 0.8  0.0  3357 gnome-sound-applet

 0.8  0.0  3267 /usr/lib/gnome-settings-daemon/gnome-settings-daemon

 0.7  0.0  3458 /usr/lib/gnome-online-accounts/goa-daemon
 

Biggest cpu consuming processes

root@kali:~# ps -eo pmem,pcpu,pid,args | tail -n +2 | sort -rnk 2 | head
0.1 26.4  5845 find / -name *fg*
1.8  0.0  3304 gnome-panel
1.3  0.3  3365 /usr/lib/vmware-tools/sbin64/vmtoolsd -n vmusr --blockFd 3
1.3  0.3  2642 /usr/bin/Xorg :0 -br -verbose -novtswitch -auth /var/run/gdm3/auth-for-Debian-gdm-0vVbZF/database -nolisten tcp vt7
1.3  0.0  3370 nautilus -n
0.9  0.1  3468 gnome-terminal
0.9  0.0  3377 nm-applet
0.8  0.0  3371 gnome-screensaver
0.8  0.0  3357 gnome-sound-applet
0.8  0.0  3267 /usr/lib/gnome-settings-daemon/gnome-settings-daemon


Explanations

- ps Report a snapshot of the current processes
- -e Select all processes
- o Specify user-defined format
- pmem,pcpu,pid,args user-defined format: memory,cpu, pid number and command
- | tail -n +2 Output lines starting to the second line (to avoid column names such %MEM, etc ...)
- | sort -rnk 1 reverse (r), numeric sort (n) by column 1 (memory)
- | sort -rnk 2 reverse (r), numeric sort (n) by column 2 (cpu)
- | head output the 10 first lines
Enjoy !!!

 
By myself: below is what I want and recommend
[root@vm-www ~]# pidstat | tail -n +4 |grep mysql | sort -rnk 6 | head -5 


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