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ADDM does not work in a pluggable database (PDB) by default, because automatic AWR snapshots are disabled by default in a PDB. Starting 19c , To use ADDM in a PDB, you must enable automatic AWR snapshots in the PDB by setting the AWR_PDB_AUTOFLUSH_ENABLED initialization parameter to TRUE and AWR snapshot interval greater than […] Starting 19c, Restore points that are created on a primary database are automatically replicated to the standby database. The restore points created on the standby database are called replicated restore points. Irrespective of whether a restore point on the primary database is a guaranteed restore point or a normal restore point, the corresponding replicated restore […] Cloud Feature – Not working in On Prem installation. Oracle Database 12c introduced online statistics gathering for CREATE TABLE AS SELECT statements and direct-path inserts. Oracle Database 19c introduces real-time statistics, which extend online support to conventional DML statements. Because statistics can go stale between DBMS_STATS jobs, real-time statistics helps the optimizer generate more optimal […] Statistics gathering until 18c was on daily/weekly basis based on the maintainance tasks defined. Say 10PM every day with 8 hour window on weekdays and 24 hrs window on week ends. And how many times we have seen statistics have become stale between two collections and DBA’s has to manually intervene and collect stats. From […] |
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Oracle 23c New Features for DBA's
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