o VM changes in DragonFly reduces Memory usage considerably
http://www.shiningsilence.com/dbsdlog/2011/10/29/8604.html
o More multi-core improvements
"Matthew Dillon wrote up an explanation of how performance on systems
with a lot of CPU cores has been significantly improved – up to 300%!
(He says 200%, but I think he’s treating it as a percentage of a whole
rather than percent changed.) Apparently finally getting rid of lock
contention is the trick."
by Justin Sherrill
http://leaf.dragonflybsd.org/mailarchive/commits/2011-10/msg00138.html
o You can now have, in theory, up to 32 terabytes of RAM on your
64-bit DragonFly system.
http://leaf.dragonflybsd.org/mailarchive/commits/2011-11/msg00067.html
o Postgres Scaling Improvements
http://www.shiningsilence.com/dbsdlog/2011/10/31/8615.html
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