postgres on Solaris 10 with ZFS

Hi All,

I have solaris 10 update5 sunfire X4240 with 32GB RAM and ZFS system.I am
having problem while configuring below parameters especially how shmmni
works ---

1) shmmax
2) shmmni
3) arc_max
4) shared_buffers

Since, it's a dedicated server i want to utilize all resources.As of now i
have set parameters as below --

1) shmmax -- 16GB ( size of single shared memory segment)
2) shmmni -- Default 100
3) arc_max -- 26 GB
4) shared_buffers -- 2 GB
5) effective_cache_size -- 5GB

Also, would it be possible if i can have more memory segment for same
postgesql.If yes How ?

Please help.

Regards,
AG