[rescue] Ultra1 OBP firmware message on installation boot

[Patrick Giagnocavo +1.717.201.3366]

I am loading Solaris 9 on an Ultra1/170 with OBP 3.5 .

On boot, the installer gives a message about using the 32bit OS
instead of 64bit OS.

I googled and found out how to change it, but my question is, is there
a performance difference between the 2 kernels?  

I will be doing some PostgreSQL and web serving and some Perl (spit).

--Patrick