Tue, 29 Jan. 2008 by Thomas Bendler, approximately 1 minute to read.
From time to time I had the problem that a server is not responding as expected. To figure out what the problem is you can use several command line tools on a Linux host that gives you an idea what is wrong. Therefore I normally install two tools on my CentOS servers:
Both tools are quite handy if you want to determine where the performance bottleneck is on your machine. Let’s start with something like this:
See an example output taken on one of my servers:
This should give you an impression how the health of your system looks like. In this example, you can see that the server has massive %iowait problems. Also, you can see in the history that these problems were fixed sometime between 14:30h and 14:40h.