Hi,

Bind 9.16 was installed on 3/2 15:45 and tcp connections ramped up to maximum:
   rndc status | grep -i tcp
   tcp clients: 102/150
   TCP high-water: 150

Switching back to bind 9.14 on 3/4 15:45 shows "normal" tcp client behavior:
   rndc status | grep -i tcp
   tcp clients: 29/150
   TCP high-water: 67

I have found some tcp related changes in the later versions of 9.15 
<https://ftp.isc.org/isc/bind/9.16.0/CHANGES>, but nothing which is explaining 
this kind of behaviour.
(attachment is in logarithmic scale)
Has someone else experienced this too?

cheers,
Arsen
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