Ubuntu – Monitor CPU usage over period of time on Ubuntu

central-processing-unitmonitoringtopUbuntu

Is there some way to monitor my CPU usage over a period of time, e.g. get a graph that shows CPU% vs. date/time? I occasionally see high load using htop, but I'd like to see what's happening throughout the day.

The more lightweight, the better 🙂

Best Answer

There's nmon for Linux which is in Ubuntu build. You can run nmon in 'spreadsheet' mode where it samples data every few minutes and saves it to a file. There are various tools for then graphing that, or you can just review the data manually.

More complex options include things like munin, cacti, etc. but they look at just more than straight CPU.

Related Solutions

Linux – How to See What’s Waiting for Disk IO

You can use an I/O monitor like iotop, but it will show you only processes or threads with current I/O operations.

If you need to browse processes waiting for I/O, use watch to monitor processes with STAT flag 'D' like below:

watch -n 1 "(ps aux | awk '\$8 ~ /D/  { print \$0 }')"

Perfmon % Processor Time vs. task manager’s CPU usage

Most people tend not to watch processor time but instead Processor Queue Length (number of threads waiting for a processor).

That being said there's a good explanation here:

http://www.windowsnetworking.com/articles_tutorials/Key-Performance-Monitor-Counters.html

Best Answer

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Linux – How to See What’s Waiting for Disk IO

Perfmon % Processor Time vs. task manager’s CPU usage

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