bind9 & multiprocessing
Bob.Halley at nominum.com
Thu Mar 23 21:01:55 UTC 2000
Jeffrey Cioli <jcioli at cisco.com> writes:
> i have been experimenting w/ bind9 regarding ddns.
> i noticed a couple of things regarding performance.
> first, bind9's performance is very similar to bind8.
> i would think that the multithreading capability of bind9
> would help. i ran my tests on both a uni-cpu sparc-u5
> (333 mhz) and a dual-cpu e250 (400 mhz each). i actually
> saw performance decreased on the dual-cpu e250. i would
> expect performance to increase. but, then ddns is io bound
> due to the journeling.
> is multithreading and multiprocessor support enabled for
> bind9 b1 ???
Yes. Did you start the server with '-n 2'? If you have multiple
processors, you need to use the '-n' option to tell BIND 9 how many
you have, so it can create an appropriate number of worker threads.
Also, beta 1 doesn't yet call pthread_setconcurrency() or
thr_setconcurrency() on Solaris, so that might be causing problems
If all of your updates are to the same zone, you're going to see a
limited benefit from the multiple CPUs, because all of the updates to
any given zone are serialized.
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