Performance & Tuning

Automatic Maintaining SQL Tuning Advisor.    

http://dbaocm.blogspot.com/2015/03/automatic-maintaining-sql-tuning-advisor.html

Change ADDM/AWR Snapshot interval to 2 minute     

http://dbaocm.blogspot.com/2015/03/change-addmawr-snapshot-interval-to-2.html

DBMS_STATS. GATHER_DICTIONARY_STATS fails with ORA-20001 ORA-6502 ORA-6512 - Concurrent Stats (from Oracle -Mike Dietrich)https://blogs.oracle.com/UPGRADE/entry/exec_dbms_stats_gather_dictionary

resmgr:cpu quantum

http://dbaocm.blogspot.com/2015/12/resmgrcpu-quantum.html

SQL Tuning Set cannot be deleted because there are advisors tasks dependent on it
http://dbaocm.blogspot.com/2016/03/ora-13757-sql-tuning-set-string-owned.html