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I'm running bind 9.5.1 on debian lenny. Unfortunately the machine does not have a lot of memory (only 500MB) and with apache, db and mailserver this is getting tight. Currently bind takes about 10% and is the top consumer of memory - any clues to diminish this? Already cut down on cache, can't really find more options. Perhaps alternative dns server? It only serves a couple domains.

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Is it for authoritative service or for recursive one? – bortzmeyer Jul 2 '09 at 11:41
This is for an authoritative service – mfx Jul 3 '09 at 21:32
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Yeah, BIND is a memory hog. Personally, I'm a fan of tinydns part of djbdns for low-memory footprint DNS service. It's not like BIND at all in terms of config and management, but it's damn small, quite fast, and once you get used to it, I think it's better than BIND in many ways.

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I completely agree with this -- ditch bind and use tinydns + dnscache. – chris Jun 25 '09 at 23:21
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Are you using bind for authoritative hosting of domains, or for a caching resolver?

If for authoritative hosting, turn off recursion (there's no need for a cache if you're not doing recursion); or try tinydns.

If for caching/recursive lookups, then give a lighter caching resolver a shot (like dnscachex).

Failing that, third-party DNS hosting is readily available.

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The former - authoritative hosting of two domains. Will give a go at tiny dns. Otherwise I would have used nscd. – mfx Jun 26 '09 at 9:35
If you try tinydns and encounter any difficulty, please ask a question and I or somebody else will try and help you out. That's what serverfault is here for. – Mark Johnson Jul 13 '09 at 19:54
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