Oracle · PL/SQL - SQL

ORA-4068 Errors for Valid Objects

Compilation of oracle objects are pretty easy where there is no activity on the database. If the objects are heavily accessed and the compilation takes place then you should be prepared for the worst case scenarios.Depending on the object dependency and access rates, sometimes downtime is required. Offline the system and compile the objects and… Continue reading ORA-4068 Errors for Valid Objects

Dataguard · Oracle · RMAN

Restore Corrupt Datafile using Another Standby

If there is a corruption on one of the datafiles on a dataguard you can restore the corruption using another dataguard. I will explain how to do the restore operation in rman using oracle 11.2. ON THE WORKING DATAGUARD Backup the datafile as image copy. RMAN> BACKUP AS COPY DATAFILE 178 FORMAT “+data/test2/datafile/test_datafile178”; Uncatalog the… Continue reading Restore Corrupt Datafile using Another Standby

Exadata · Oracle

When is the last time you changed a flashdisk or harddisk on Exadata ?

Why is this question is important for a DBA ? Actually the results are pretty surprising when you execute the query and see the last inserted date of a harddisk or a flashdisk. In another way, that information shows you the time you changed a faulty harddisk or flashdisk on the exadata. If you deleted… Continue reading When is the last time you changed a flashdisk or harddisk on Exadata ?