Hi!
I run a number of BIND9 (9.16-27-1~deb11u1 - Debian Stable) secondaries with some large zones (10s
of DNSSEC-signed zones with ~100k records, not counting signatures, with a smattering of other
zones). Somewhat to my surprise, even with "recursion no" the memory usage of instances is highly
correlated with the hosts's available memory - BIN9 uses ~400M RSS on hosts with 1G of non-swap
memory, but 2.3G on hosts with 4G of non-swap memory, all with identical configs and the same zones.
I can't seem to find any references to anything in the ARM which would allow tuning of memory usage
for non-recursive servers, and the only real reference to anything about memory I could find was
"max-cache-size". The entire bind config follows:
zone "." { type hint...}
zone "localhost/127/0/255.in-addr.arpa" { type master; ... }
zone "zones.catalog" { type slave; file ...; masterfile-format text; masters {
.. }; notify no; };
zone "zones2.catalog" { type slave; file ...; masterfile-format text; masters {
.. }; notify no; };
options {
dnssec-validation auto;
listen-on-v6 { any; };
allow-transfer { none; };
notify explicit;
recursion no;
max-journal-size 4096;
max-cache-size 8M;
zone-statistics yes;
masterfile-format raw;
catalog-zones {
zone "zones.catalog"
default-masters { ... }
in-memory no
min-update-interval 10;
zone "zones2.catalog"
default-masters { ... }
in-memory no
min-update-interval 10;
};
};
Thanks,
Matt
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