I think it's talking about how the Oracle software handles _processing_ internally such as enqueues, latches, locks, interconnect traffic between nodes, asm block lookups, that sort of thing. Chris -----Original Message----- From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Vasu Sent: Wednesday, March 13, 2013 1:15 PM To: oracle-l@xxxxxxxxxxxxx Subject: What is oracle internals ?! I see the term "Oracle Internals" used in some of the Oracle-DBA job postings , not sure what they mean by that. I "guess", by internals they mean , knowledge of few more v$ tables , session trace & troubleshooting . On the other hand, "Internal" really means , something internal to Oracle Corp that they need not disclose . Long ago, I was trying to learn more about SCN.. and a blog told SCN-generation is internal to Oracle and is not available to public (and should not be hacked or so). Any ideas, when an Oracle DBA/Architect can say they know internals ?! :-) Thanks -Vasu -- //www.freelists.org/webpage/oracle-l -- //www.freelists.org/webpage/oracle-l