Ever wondered how much disk i/o is taking place on your linux-based server (or workstation)?
Here are some commands:
The iostat makes a snapshot of each available physical volume, and shows the current reads and writes of the volumes.
dstat -dnyc -f 5
dstat is a more advanced code, and measures both disk i/o as well as network i/o in near realtime.
Got this link from a colleague:
It describes the inner workings of Postfix, the well-known mailserver for Linux.