You can use the CLI command 'show chassis routing-engine' and 'show chassis environment' to compare the value, but remember, the value is real time, so it may be different. There might be other solutions, but atop is easy to understand and use and a good start before doing some more bespoke setups. The value for CPU/memory usage is in percentage. You have then access to all 'top' like functions (sorting/looking at memory/CPU/IO usage, etc.) and you can jump 10 minutes forward in time via 't' and 10 minutes back with 'T' or jump at a specific time via 'b'.Ĭheck out the atop manpage and google has lots of howtos about it. The more interesting part is: Once installed a daemon starts logging data into /var/log/atop and you can read these files with atop again: atop -r /var/log/atop/atop_20160128 It will also give a readout of users, tasks, CPU load, and memory usage. You can use atop like a normal real-time top utility, with slightly different behaviour (check out the manpage for keystrokes). How To Check CPU Usage from Linux Command Line top Command to View Linux CPU Load Open a terminal window and enter the following: top The system should respond by displaying a list of all the processes that are currently running. Instead, you have to read /proc/stat several times: each column in the cpu(n) lines gives the total CPU time, and you have to take subsequent readings of it to get. Linux does not have any system variables that give the current CPU utilization. atop is very good at this, at it takes care of logfile retention.Ītop is available via the EPEL repo for CentOS/RHEL/Fedora and via the default repos of Debian/Ubuntu. Also, you can write a small script in bash or perl to read /proc/stat and calculate the CPU usage. Better it would be to use a specialized program, which does this for you.Unlike disk and memory, monitoring the CPU usage on a Linux system isn’t as straightforward. Hence, monitoring these components is crucial. For user-interactive tasks as described above this provides a much better user/application experience as their cpu utilization will more closely match the amount they requested when they hit throttling. Insufficient system resources such as storage, memory, and CPU (Central Processing Unit) can greatly affect an application’s performance. You could use cron to write the output of ps (and other commands) every x minutes into a logfile. For CPU bound tasks this will change nothing, as they should theoretically fully utilize all of their quota and slices in each period. use a script which writes needed data on a regular basis to a logfile.
0 Comments
Leave a Reply. |