On Mon, 2024-12-02 at 15:11 +0000, Stephen Borrill wrote:
On a busy squid proxy server, users are seeing performance problems
and
squid is logging the following:
2024/12/02 15:00:06 kid1| comm_udp_sendto FD 9, (family=2)
127.0.0.1:53: (55) No buffer space available
2024/12/02 15:00:06 kid1| idnsSendQuery FD 9: sendto: (55) No buffer
space available
Now I remember, I have seen this before. BIND assumes it's running as a
forwarder for an ISP and that it will therefore be expected to cache
the entire Internet's DNS. It will use all available memory.
I had to add the following
max-cache-size 25%;
to the options block in my named.conf to get reasonable behaviour on my
multi-purpose server.