Performance under glassfish-any tuning suggestions?

Hi All-

I’ve converted one of the applications from mri to jruby, and used
to deploy it under glassfish v2. Everything works, but performance
glassfish is just awful compared to mri/mongrel or jruby/mongrel.

I’ve already enabled thread pooling from withing the glassfish admin
console, as well as upped the memory and permgen(as suggested by…is there anything else
can do to improve the performance of jruby under glassfish?

FYI, I’m using jruby 1.1.4 and jruby rack 0.9.2 from warbler 0.9.11
Mike Kohout