BIND 9 crapping out at 510 MB

[Len Conrad]

fbsd 4.11
BIND 9.3.2

recursive-only named.

On two different machines, 2 or 3 times each, when the named 
footprint reaches about 510 MB,
queries fail with SRFVAIL,
rndc flush and rndc stop don't work,
rndc status does work

kill named-pid  doesn't work

we must "kill -KILL named-pid"

To try to prevent the problem, we have added

max-cache-ttl 43200

to try to flush records at 12 hours max.

Len