Oracle DBA Lesson 5B — Working in the Right Container

Oracle DBA · Lesson 5B Working in the Right Container Your session is always in one container. Confirm it with SHOW CON_NAME bef...

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Oracle DBA Lesson 5A — CDB Anatomy

Oracle DBA · Lesson 5A CDB Anatomy Root, seed, and application PDBs sit inside one CDB. Know which container you are in before y...

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Oracle DBA Lesson 4 — Why Pluggable Databases Exist

Oracle DBA · Lesson 4 Why Pluggable Databases Exist Separate application databases each want their own instance — memory, backgr...

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Oracle DBA Lesson 3 — Single Instance vs RAC

Oracle DBA · Lesson 3 Single Instance vs RAC Copy a Data Guard runbook onto a RAC cluster — or the reverse — and you stop the ...

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Oracle DBA Lesson 2 — What a Session Is

Oracle DBA · Lesson 2 What a Session Is “I have 2,000 connections” might mean sockets, sessions, or server processes. Those are ...

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The Instance and the Database

Oracle DBA · Lesson 1 The Instance and the Database Oracle has two parts: what is running, and the files that keep saved data...

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