View from the top
The venerable (and still exceedingly useful) top tool is immensely useful for seeing who is consuming all your CPU and memory. However, it’s not so good on showing who is eating your disk IO, or network bandwidth.
Unsurprisingly, people have run with the top concept and produced a wide range of other tools:
- iotop, to show the consumption of disk IO (which we’ve previously covered in detail);
- iftop, for your network;
- htop, an enhanced top with bargraphs and other “Sysadmin 2.0” features;
- mytop, for when there are queries that are killing your MySQL server.
All top tools, and worthy of a look.
(sorry, couldn’t resist)