Database DataWarehousing (MOSC)

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FAST enabled MView takes ages to refresh

edited Jun 20, 2011 11:10PM in Database DataWarehousing (MOSC) 1 commentAnswered
 
I have a materlialized view which is based on a single fact table ( OAS_BALANCE_UNIONED 11,445,156 rows) and a bunch of dimension tables each containing limited number of rows.
The conditioins to make the mview fast refreshable have been met so the mview created successfully with the FAST option.
The mview then worked just fine after than and had been refreshing FAST (6 minutes) for the whole day till other mviews started to refresh in the same time. Some of those mviews read from some of the base tables of the mview in question. Since then, the mivew has started to take ages (3 hours) to refresh. There is surely something wrong because the COMPLETE refresh was faster than that.

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