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.
Answer
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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