[Building Sakai] Performance problem

[Joshua Swink]

We have about a maximum of 600 concurrent users and our performance is
pretty poor. The application servers aren't working very hard so I
suspect the database server. It's running Oracle 10 on a Sun V880 with
8 GB RAM and 8 750MHz CPUs. We also store the resources in the
database. The database is about 100 GB in size right now.

What's the best way to configure Oracle in this situation? What memory
settings should we use?

Thanks for any help.

--
Joshua Swink