SEARCH
diglloydTools™
Links on this site earn me fees or commissions.
As an Amazon Associate I earn from qualifying purchases @AMAZON
As an Amazon Associate I earn from qualifying purchases @AMAZON
Designed for the most demanding needs of photographers and videographers.
Connect and charge all of your devices through a single Thunderbolt or USB-C port.
Monitoring System Activity on the Command Line
Monitoring performance in Terminal can be useful for diagnosing performance issues, using the top and vm_stat tools (and iostat for disk I/O).
These tools are used in a window. The most useful tool is top, which can be left running continually, refreshing the window at regular intervals.
top
Show top 10 processes by CPU usage every 2 seconds, with data collected every 5 seconds:
top -o cpu -s 2 -i 5
Show top 10 processes by real memory every 2 seconds:
top -o rsize -s 2
'top' display by CPU usage
vm_stat
The vm_stat tool also provides some useful statistics on the use of real memory, compressed memory and virtual memory.
'vm_stat' output
iostat
The iostat tool also provides statistics on disk I/O.
Show up to 16 drives every 2 seconds:
iostat -w 2 -n 16
iostat output at 2-second intervals
