July 2016
Intermediate to advanced
180 pages
3h 16m
English
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Command line tools for system and process management
The command line is an invaluable tool for system monitoring. In this section, we'll go over a few basic GNU/Linux command line utilities for system and process management. Knowing these tools is essential for anyone managing an Elasticsearch cluster on GNU/Linux.
top
The top command lists processes with the highest CPU and memory. This tool is useful to determine whether a process other than Elasticsearch is hogging resources, or to check whether Elasticsearch is using an abnormal amount of CPU or memory.
The top command refreshes automatically, so you only have to run it once and watch.
When running the command, you should see the following result:
The top command
Tip
Press Shift+M while top is running ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.