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  Oracle Replication Tips by Burleson

Updating Oracle Materialized View Data

parameter job_queue_process is set to a value greater than 0.  Setting the job_queue_process will enable one or more different job scheduler threads. These threads can and do run in parallel - set them carefully or there will be so much parallel activity that the database is brought to its knees.

If the refresh fails for any reason, including problems with the database link or the master database site, the job will log a failure in the dba_jobs column FAILURE and reattempt the refresh after a period of time.   Normally, a job will attempt to re-execute one minute after the first failure, then two minutes after the second failure, four minutes after the third failure, and so on until it reaches either 16 failures or the time reaches the refresh interval. 

This is an excerpt from Oracle Replication By Rampant TechPress (only $19.95).  You can click here to order a copy and get instant access to the code depot:

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