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Re: MariaDB and Sun CoolThread


Hi Mark,

	It makes sense.


Em 04/04/2011, às 10:55, MARK CALLAGHAN escreveu:

And then because this is Sun CoolThread hardware, each connection runs
on really, really slow CPUs. And 48 threads running concurrently will
get a lot of mutex contention from MySQL so maybe running 4 copies of
mysqld with each instance locked down to 12 CoolThread CPUs will help.

On Sun, Apr 3, 2011 at 11:07 PM, Kristian Nielsen
<knielsen@xxxxxxxxxxxxxxx> wrote:
Alexandre Almeida <alexandre@xxxxxxxxxx> writes:

      As far as I can see MariaDB stay locked/running on a single
virtual  CPU and MariaDB doesn't take advantage of CoolThread/CMT
technologies, I mean it can not run on more than one virtual CPU same
time. Result:  poor performance.

      Anybody knows if there is something can I do to spread ;-)
MariaDB  all over cpus? Am I missing something?

Each client connection will run on its own cpu. So to use all cpus your
application needs to run many queries in parallel.

 - Kristian.

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Mark Callaghan