I’m working on switching my 600+ simple queues to PCQ queues using Queue Tree. I have one PCQ queue that will have about 400 different users in it and even more in the future. I set it to Rate: 512k Limit: 50 and Total Limit: 20000. If I understand the PCQ examples correctly, that should be OK for up to 400 concurrent users.
My question is, can the PCQ queue I described above handle that number of users/connections OK?
Is there anything wrong with my settings of Rate: 512k Limit: 50 and Total Limit: 20000 for that queue?
What do you recommend the Limit value be set for best performance? The router has 2gigs of RAM, so memory isn’t a factor.
Memory is not a factor on this router (2 gigs of RAM). 50 is the default value for limit. Increasing it decreases drops, but doesn’t that also increase latency in the network, when PCQ is actually queueing? I just want to fully understand the pros and cons of adjusting these setting. What’s a good number to run the PCQ Limit at?
“longer queue = more delay”??? don’t you think, that shorter queue = longer delay due to drop and following resend? =) queue do not pass data faster than rate in any case
Both parties are right and wrong at the same time.
It all depends on traffic type. For some it is better to have drops, but other packets must arrive without latency (VOIP for example), for others all packets must arrive and no matter when (any type of TCP).
As we have all this traffic together, it is necessary to find balance. In my case it is ~20-30 packets for every PCQ substream.
that way, user who did reach its limits, does not interfere with user that did not, and if you have high latency - you know (as an user) that you have to stop some netapp, so you get better latencies for what you need at that moment.
Dear ,
In PCQ
How Much packet is exceptional in Limit ? Limit 500 and Total Limit 100000 ? for 200 Users at 2Mbps Rate ?
Please and please suggest me , i am in large confusion about Limit And Total Limit … Please
Dear ,
Thank you so much for the answer ,
and MTU and MRU if i keep default values than all PPPoE clients disconnects in a gap of 8/10 hours , and i can’t catch it where is the fault , if set MTU and MRU to 1492 than clients disconnects in a gap of 20/24 hours
it is horrible for me .
my pppoe server keep alive timeout is default 10 , and default profile is set as default …
authincation PAP .. given a picture here
