iostat and microseconds

Solaris 11.4 got a small extension to the iostat command. In a time when storage storage gets faster and faster, you may end in a situation where the wsvc_t and asvc_t always show zero despite the fact that there is actually some load on the interface. This happens when the resolution of milliseconds iostat used so far isn’t precise enough. So the -u option was introduced a while ago in Solaris 11.4. With this resolution is microseconds and so it’s much better suited to monitor your storage devices.

For more details, please visit: http://www.c0t0d0s0.org/2021-03-12/iostat-microseconds