nobleit
asked on
snapshots
How we will use snapshots in oracle 11g?
Could you expain why?
Could you expain why?
Mohammed SII
u should have snapshot software
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Take advantage of MV's with the below points
1) Use refresh fast option instead of complete.
2) Use query rewrite enable
3) try to avoid MV which fetches the data using the database link. If it cannot be avoided, try to reduce the amount of data that is fetching. eg. instead of pulling 2 years data, pull 1 year data or few months data. Because fetching data over the network/database link if it is huge will create tension.If it is a critical process in critical time, then after running for 6 hours, if the MV refresh fails, then people will be on toes. Very important to focus on the process that involves MV.
4) If huge data pulling is unavoidable, try creating to MV's. eg. 1 MV for 1 year data and 2nd MV for 2 year data.. So that both MV refreshes can be run in parallel to reduce the overall completion time.
5) IUse 32k block size tablespace for MV to increase the speed dramatically
6) many more to explore....
1) Use refresh fast option instead of complete.
2) Use query rewrite enable
3) try to avoid MV which fetches the data using the database link. If it cannot be avoided, try to reduce the amount of data that is fetching. eg. instead of pulling 2 years data, pull 1 year data or few months data. Because fetching data over the network/database link if it is huge will create tension.If it is a critical process in critical time, then after running for 6 hours, if the MV refresh fails, then people will be on toes. Very important to focus on the process that involves MV.
4) If huge data pulling is unavoidable, try creating to MV's. eg. 1 MV for 1 year data and 2nd MV for 2 year data.. So that both MV refreshes can be run in parallel to reduce the overall completion time.
5) IUse 32k block size tablespace for MV to increase the speed dramatically
6) many more to explore....
ASKER
Sorry for the delay. The issue is solved. Thank you for all your support..
ASKER
please accept jocave and give points