Tuesday, January 28, 2020

Showing memory usage in Linux by process and user

There are a lot of tools for looking at memory usage on Linux systems. Some are commonly used commands like free and ps while others are tools like top that allow you to display system performance stats in various ways. In this post, we’ll look at some commands that can be most helpful in identifying the users and processes that are using the most memory.

Here are some that address memory usage by process.

Using top

One of the best commands for looking at memory usage is top. One extremely easy way to see what processes are using the most memory is to start top and then press shift+m to switch the order of the processes shown to rank them by the percentage of memory each is using. Once you’ve entered shift+m, your top output should reorder the task entries to look something like this:

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Thanks to Sandra Henry-Stocker (see source)

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