> From: Dwayne Hottinger <dhottin...@harrisonburg.k12.va.us>

> I keep seeing messages in my named.log file that say things 
> like clients-per-query increased to 30, then later it says clients-
> per-query decreased to a lower number.  When this happens, lookups 
> seem to not be working.    What is an acceptable value for a large 
network?

For the same reason it was increased to 15 in this thread: 
https://lists.isc.org/pipermail/bind-users/2013-April/090402.html 

Do you have a bottleneck on your queries to authoritative servers?  If 
your recursive server can't resolve it for the first few clients that ask 
the question, it queues the query for subsequent clients that ask the same 
question.  And it can't respond to any of them until it receives the 
answer from the authoritative server.

What do your client queries look like?  Have you turned on query logging 
to see what the clients are trying to resolve?  Which are your top 
clients?  Did you do something to the cache settings?  How many clients 
are you trying to support?



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