I have been revisiting PCQ queues recently and have found it difficult to find a straight forward formula or definitive answer on how to calculate the PCQ settings.
I will give two different examples just so I can get it clear in my head.
I have so far left the default pcq-limit of 50Kib and 2000Kib on the pcq-total-limit as I believe that is supposed to be the pcq-limit X number of concurrent users and seeing as we only have about 9 but about 50 DHCP leases I am not sure if I should change this or not.
A small office scenario where there is 30Mbps download and 20Mbps upload
There is about 50 DHCP leases but only about 9 active PCs/Users through-out the day
subnet is a /24
I am currently testing :
* name="pcq-down-30M" kind=pcq pcq-rate=30M pcq-limit=50KiB pcq-classifier=dst-address pcq-total-limit=2000KiB pcq-burst-rate=0 pcq-burst-threshold=0 pcq-burst-time=10s pcq-src-address-mask=32 pcq-dst-address-mask=32
* name="pcq-upload-20M" kind=pcq pcq-rate=20M pcq-limit=50KiB pcq-classifier=src-address pcq-total-limit=2000KiB pcq-burst-rate=0 pcq-burst-threshold=0 pcq-burst-time=10s pcq-src-address-mask=32 pcq-dst-address-mask=32
* name="LAN-WAN" target=192.168.38.0/24 parent=none packet-marks="" priority=8/8 queue=pcq-upload-20M/pcq-down-30M limit-at=0/0 max-limit=20M/30M burst-limit=0/0 burst-threshold=0/0 burst-time=0s/0s bucket-size=0.1/0.1
It is my understanding that given only a single user online and every other user isolated when performing a speedtest results should reach somewhere close to 30down 20 up with these settings (assuming 30/20 bandwidth was originally available which it is)
60 Concurrent users
Is it still ok to use the default 50Kib pcq-limit?
What would other settings be etc?
thanks in advance for input