Poor mysql scaling across the board pre 5.1.22?

[Kris Kennaway]

Steven Hartland wrote:
> Some interesting comments here:
> http://www.anandtech.com/IT/showdoc.aspx?i=3162&p=10

Indeed, mysql 5.0 has poor scaling compared to postgresql (this affects 
reads but severely affects writes).  However when I tested the latest 
beta of 5.1 about 6 months ago I found it had about 50% lower 
performance than 5.0 in a read-only configuration.  Maybe they had left 
some debugging enabled or have since fixed it.

Kris