How to check the "Run Queue and Swap Queue Size"

# sar -q 5 3

The above command is used to determine the Run Queue and Swap Queue Size.

We can find the number of threads/process waiting in the run queue using the "vmstat" command. But the above would give much more visibility in terms of % of time the run and swap queue was occupied.

runq-sz : Shows average no.of threads present in run queue.

%runocc : Percentage of time the run queue was occupied.

swap-sz : Shows average no.of threads present in the swap queue.

%swapocc : Percentage of time the swap queue was occupied.

Use "vmstat" to find the disk performace

# vmstat hdisk1 hdisk2 hdisk3 hdisk3 1 10

The above command is use to find the "Disk Transfer" rate. The "disk xfer" rate is used to display the transfer rate on the hdisks#. Maximum of 4 hdisks could be used in the command.