Hi Jan. Since the queries are unique the responses should be NXDOMAIN, which *will* be cached and therefore consume memory. This is why I was curious what you are hitting it with. You can see these cache entries if you dump it using "rndc dump -cache". This produces a file (by default) called "named_dump.db" in named's working directory. Grep for NXDOMAIN in that file.
Cheers, Greg On Tue, 14 Feb 2023 at 15:29, Jan Schaumann via bind-users < bind-users@lists.isc.org> wrote: > Jan Schaumann via bind-users <bind-users@lists.isc.org> wrote: > > Greg Choules <gregchoules+bindus...@googlemail.com> wrote: > > > > - Are you stuck on 9.16.30 for some reason? If not, grab the latest > 9.18 > > > package. It will be less memory hungry generally and contain fixes for > > > recent issues. > > > > Yeah, will give that a try. > > Upgrading to 9.18.11 by itself did not help, but > setting an explicit 'max-cache-size' does seem to. > > The queries I'm doing right now are all unique > second-level domain queries, so no caching takes > place, while at the same time the cache grows > proportionally with the queries. > > I'm guessing that without a set 'max-cache-size', this > continues to grow until there is no more memory space > left, we start swapping, and eventually get OOM > killed. > > https://bind9.readthedocs.io/en/v9_18_11/reference.html > claims that the default 'max-cache-size' is 90% of > physical memory, but it seems that didn't work out > here. Might it be that on NetBSD, bind doesn't > correctly determine the physical memory amount? > > -Jan > -- > Visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe > from this list > > ISC funds the development of this software with paid support > subscriptions. Contact us at https://www.isc.org/contact/ for more > information. > > > bind-users mailing list > bind-users@lists.isc.org > https://lists.isc.org/mailman/listinfo/bind-users >
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