Hi,
Here is the NSD 4.1.0 release:
http://www.nlnetlabs.nl/downloads/nsd/nsd-4.1.0.tar.gz
sha1 cb4ec496eaec5bfbd5b9f4b361da2a0a79d17030
sha256 ec3f6902f6f26a6b9248dcd7e9f42472fa52755740b4ba6b9d3bd08910b39b62
This release has new features and bugfixes. In nsd.conf you can
configure database: "" this makes NSD not use the large mmapped nsd.db
file, but instead read and write the zonefiles in text format, which
saves about 50% of the memory usage. Also zonefile reading and
writing has been optimised to be faster, as well as processing time
for zone transfers. NSD writes the (changed) zonefiles every hour.
The new nsd-checkzone tool reports if a zonefile parses so you can check
it before reading it into the daemon.
A bug is fixed where NSD 4 causes rising load average and memory
consumption on Linux systems, which is caused by a bug in Linux that
slowly deteriorates system performance by repeated recursive forks.
4.1.0