Re: Shared memory

[Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>]

Thomas Hallgren <thomas(at)tada(dot)se> writes:
> Tom Lane wrote:
>> It's only that much difference?  Given all the other advantages of
>> separating the JVM from the backends, I'd say you should gladly pay
>> that price.
>> 
> If I'm right, and the most common scenario is clients using connection pools, then it's very 
> likely that you don't get any advantages at all. Paying for nothing with a 440% increase in 
> calling time (at best) seems expensive :-)

You are focused too narrowly on a few performance numbers.  In my mind
the primary advantage is that it will *work*.  I do not actually believe
that you'll ever get the embedded-JVM approach to production-grade
reliability, because of the fundamental problems with threading, error
processing, etc.

			regards, tom lane