On Nov 11, 2007, at 2:17 PM, Joshua D. Drake wrote:
Dimitri wrote:
Seems to me there is more thread model implementation problem on
FreeBSD, and databases just reflecting it... Most of the test I done
on Solaris show the same performance level on the same short READ-
only
queries for MySQL and PostgreSQL.
And to be honest till the end, thread model should be far faster
(context switching between threads is way faster vs processes), but -
as I say usually - even a very good idea may be just wasted by a poor
implementation... And in case of MySQL they have too much locking to
manage concurrency between threads which kills all thread model
benefits... Also, to compare apples to apples, they should run this
test from remote client rather locally on the same host - however in
this case the result for PostgreSQL will mostly depends on client
implementation: if client implements reading via CURSOR (quite
often),
reading will generate 4x times more intensive network traffic than
necessary and final PostgreSQL result will be worse...
Reading this article I'm just happy for them to see progress done
on FreeBSD :-)
As well to demonstrate OS parallelism it's not so impressive to see
4CPU server results rather 8CPU or 32threaded Niagara... Don't know
why they did not present similar performance graphs for these
platform, strange no?...
I don't find it strange. I would rather see benchmarks on what the
majority of people running on the platform are going to run.
Most people don't run 8core machines and they especially don't run
32thread Niagra boxes.
Wait! So, what do you check you're email with? :)
Erik Jones
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