Oracle 9,2.0 32 bit for Solaris can not access more than 4GB?

I am sorry to ask rather stupid question.
I joined company which has big SUN Fire running Solaris 9 64bit version.
It has system memory 16GB and 8 CPUs.
I found 8GB memory reported as free. It is production box. It is heavy loaded.
I guess Kernel parameter settings for Oracle set too low.
I reported DBA and asked DBA to improve.
My DBA said Oracle 32 bit version was installed and Oracle 32bit can't access more than 4GB system memory.
Is it true that Oracle 9.2.0 32bit for Solaris can not access more than 4GB memory?
32bit CPU and 32bit OS might have problem in access big memory.
But I never heard Oracle 9 running on 64bit Solaris box can not access more than 4GB.
Specially on Sparc 64bit chip and Solaris 9 64bit version.
I searched forums and could not find good answer. I believe it is rather obvious.
Please help me on this. I will be greatly appreciated.
Thanks in advance.
Message was edited by:
user524303

I was really surprised by the fact that almighty
ORACLE can not access 4GB memory.
So, it is true that 32bit Oracle is limited by 4GB RAM.Nope. 32bit almighty anything is limited to (max) 2^32 virtual adresses on a vmm system.
Often there is also some split where memory is divided into system and user areas, where user (program) has e.g. 2 or 3GB. All this works regardless of amount of RAM available 0.5 or 512GB.
Perhaps this link provides some useful info/background.

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