Installation Tuning

Tuning intr_queue

This will show the current setting:

sysctl net.inet.ip.intr_queue_maxlen

However, in largely loaded installations this may not be enough. Here is how to check.

sysctl net.inet.ip.intr_queue_drops

If the above shows values above 0, try changing net.inet.ip.intr_queue_maxlen *2.

For example:

sysctl net.inet.ip.intr_queue_maxlen=3000

Keep performing the above until you find the point where drops are eliminated, without any adverse effects.

Afterwards, edit /etc/sysctl.conf and add the value to it:

net.inet.ip.intr_queue_maxlen=3000