Over the last few weeks I have been doing some work on improving
the concurrency performance of PBXT. The last Alpha version (1.0.03) has
quite a few problems in this area.
Most of the problems have been with r/w lock and mutex contention
but, I soon discovered that MySQL has some serious problems of
it's own. In fact, I had to remove some of the bottlenecks in
MySQL in order to continue the optimization of PBXT.
The result for simple SELECT performance is shown in the graph
below.
Here you can see that the gain is over 60% for 32
or more concurrent threads. Both results show the performance
with the newly optimized version of PBXT. The test is running on
a 2.16 MHz dual core processor, so I expect an even greater
improvement on 4 or 8 cores. The query I ran for this test is …
Showing entries 1 to 1
Jul
14
2008
Showing entries 1 to 1