Hi Arsen, we think you are hitting a problem that was reported to us earlier. Since it has been now circulated on the bind-users, we made the merge request public:
https://gitlab.isc.org/isc-projects/bind9/-/merge_requests/3163 and patch: https://gitlab.isc.org/isc-projects/bind9/-/merge_requests/3163.patch ISC will be issuing a proper Operational Notification later this week and the fix will be included in BIND 9.16.1 due in March. Sorry for the inconvenience. Thanks, Ondrej -- Ondřej Surý ond...@isc.org > On 5 Mar 2020, at 10:11, Arsen STASIC <arsen.sta...@univie.ac.at> wrote: > > 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 > <bind9.16-tcp-d1b.png>_______________________________________________ > Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe > from this list > > bind-users mailing list > bind-users@lists.isc.org > https://lists.isc.org/mailman/listinfo/bind-users
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