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 Originally Posted by indrajit2002
I have a strange problem. Normally I rebuild all the indexes that becomes invalid after 'alter table tablename move' command. Then the indexes again become valid. But since last couple of days some particular indexes have been becoming invalid after getting rebuilt and staying valid for some time after the rebuild. Please share your ideas about the incident.
An index will become invalid - or unusable, only when base table's rowid values are changed. This happens when you do "alter table move", split or move table partitions, etc.
My guess is that table maintenance was not completed at the time index reorganization was initiated or, a second maintenance job was started after index reorganization got complete.
Pablo (Paul) Berzukov
Author of Understanding Database Administration available at amazon and other bookstores.
Disclaimer: Advice is provided to the best of my knowledge but no implicit or explicit warranties are provided. Since the advisor explicitly encourages testing any and all suggestions on a test non-production environment advisor should not held liable or responsible for any actions taken based on the given advice.
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