Greg Choules <gregchoules+bindus...@googlemail.com> wrote: > There could be SO many things going on here. I have a few questions:
All good questions, thanks! :-) > - Do you mean 200 QPS or 200,000 QPS? Actually only around 200. I'm effectively looping over a list of names and calling res_query(3). > 200 QPS is background noise and (depending what's going on) > shouldn't be close to killing a box. The system itself has no problems at all and remains responsive; it's just named that gets killed. > - 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. > - Can you give the system more memory? Real RAM, not swap. Swap is bad for > DNS generally because it's so slow. It's a virtual private server where I don't have physical access and the RAM allocated is tied to the subscription / support contract with the provider. I could pay for more RAM, but haven't had a need so far... > - What does your config look like? Do you have lots of views, RPZ, stale > cache... All those things would tend to increase the memory footprint of a > busy server, depending on the query pattern. It's a trivial configuration with just a handful of zones the server is authoritative for; the primary use is as a local caching resolver. > - What sort of queries are you hitting it with? Right now it's all MX lookups of second-level domains. > That turned into a bit more than a few! I hope some of that helps a bit. It does, in that it gives me plenty to do to better nail down the problem. :-) Thanks - if I come up with anything, I'll report back. -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
