By Francisco Munoz Alvarez Important points about LOGGING and NOLOGGING Despite the importance of the redo entries, Oracle gave users the ability to limit redo generation on tables and indexes by setting them in NOLOGGING mode. NOLOGGING affect the recoverability. Before going into how to limit the redo generation, it is important to clear…
Month: July 2008
Australia 2008 National Conference Series
I’m pleased to confirm that my paper ” Logging or Nologging: That is the Question!” submitted to the Perth and Gold Coast conferences was accepted. See you at: October,6 and 7 – AUSOUG National Conference Series at Perth, AU October,13 and 14 – AUSOUG National Conference Series at Gold Coast, Conrad Jupiters, AU For more…
What I need to know to become a DBA?
About the DBA job: Most of the people that I talk to who have difficulties starting out in their DBA career really have an issue trying to absorb the mountainous volumes of information that a DBA needs to know. After all, System Administrators make a whole career out of learning the ins and outs of…
LOGGING or NOLOGGING, that is the question – Part II
By Francisco Munoz Alvarez Redo Generation and Recoverability The purpose of redo generation is to ensure recoverability. This is the reason why, Oracle does not give the DBA a lot of control over redo generation. If the instance crashes, then all the changes within SGA will be lost. Oracle will then use the redo…
LOGGING or NOLOGGING, that is the question – Part I
By Francisco Munoz Alvarez Introduction The main question about NOLOGGING I hear all the time is: does creating a table with the NOLOGGING option means there is “no generation of redo ever”, or just that the initial creation operation has no redo generation, but that DML down the road generates redo? How and when can…