In what conditions will the value in the OSUSER column of the V$SESSION be Oracle? Is it only when we are running the background processes?
The OSUSER column is supposed to contain the operating system client user name. This means that the OSUSER is the osuser running the dedicated or shared server. For the background processes, you typically see an OSUSER column value of SYSTEM on a Windows box. I think it's the same for a Unix box. I believe you'd only see OSUSER be equal to ORACLE if you logged into the server/workstation with a user id of oracle.
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