bind 8.2.3: can't stop greedy cache

[Mark.Andrews at nominum.com]

> 
> It's a well-known fact that BIND 8 just crashes and burns when it runs
> into a memory limit, but I thought BIND 9 was supposed to deal more
> elegantly. Maybe that part of BIND 9 is still unfinished (????).

	Correct.
> 
> 
> - Kevin
> 
> Dickmost Saft User Thomas Hoehn wrote:
> 
> > We have a bind version 8.2.3 running on our servers
> > which handles quite a lot of requests so the named
> > cache/process is growing qickly. Trying limit the
> > datasize via options didn't work. After I looked into
> > source it turned out that this option is not parsed at
> > all (src/bin/named/ns_parser.c) and when I tried to
> > hardcode the datasize limit for setrlimit in
> > src/bin/named/ns_config.c: set_options:
> >
> > ns_rlimit(Datasize, (u_long) 8388608 /* op->data_size */ );
> >
> > the limit was ignored. After all I tinkered with a small
> > c-programm and found that setting the resource
> > RLIMIT_AS (virtual memory limit) for setrlimit
> > does the trick. But applied to named the server
> > process exits griping in the log with:
> >
> > xxx default: critical: savedata: memget
> >
> > So the named can't manage to limit the amount of
> > memory it uses? BTW. So does 9.1.0
> > Thats pretty bad. Any suggestion?
> >
> > Thanx in advance,
> > Thomas
> 
> 
> 
> 
--
Mark Andrews, Nominum Inc.
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark.Andrews at nominum.com