Oracle Env vars

I note that both the "Oracle Database Quick Installation Guide" and the
"Oracle Database Installation Guide" instruct one to set manually (as
opposed to setting them in .profile) the ORACLE_BSE and ORACLE_SID environment variables for user oracle. In fact, the Oct. 2004 10.1
"Installation Guide" even goes so far as to explicitly instruct their
removal from .profile. I do not see that either document (quick or full install guide) later advocates adding them to .profile.

Does this mean that user oracle should not have ORACLE_SID and ORACLE_BASE env vars defined???

Neither of the install guides directs setting any env vars prior to installing the Companion CD products. It appears to me that they are step-by-step specific (logging on, su to root, etc.), but make no mention of env vars after the initial install of just the oracle DBMS, itself. So... don't set env vars for subsequent installs of Companion products, and don't set env vars in .profile for user oracle???

How do processes run via user oracle know the SID and base directory? Are they stored in files someplace for user oracle's use?

Thank you.

-- 
David Grove

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"I think not," said Descartes, and disappeared.