Storage Statistics

The following example shows some I/O statistics:

$ vmware-toolbox-cmd stat raw text vscsi scsi0:0
num.reads = 12605
num.writes = 1039
size.reads = 533612032
size.writes = 14279680
latency.reads = 1944173239
latency.writes = 102025122

num.reads – read commands.

num.writes – write commands.

size.reads – bytes read.

size.writes – bytes written.

latency.reads – microseconds of all read commands.

latency.writes – microseconds of all write commands.

The read IOPs over the last 10 seconds can be calculated as:

(num.reads @ TimeNow) – (num.reads @ Time10sec)
–––––––––––––––––––––––––––––––––––––––––––––
 TimeNow – Time10sec

The average latency of reads over the last ten seconds can be calculated as:

(latency.reads @ TimeNow) – (latency.reads @ Time10sec)
––––––––––––––––––––––––––––––––––––––––––––––––––––––
 (num.reads @ TimeNow) – (num.reads @ Time10sec)