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Oracle B-Tree indexes

edited Feb 9, 2015 10:55AM in Database Tuning (MOSC) 5 commentsAnswered

Hi All,

I was looking into scheduling a rebuild of our indexes but increasingly shying away from doing this.  I have read many articles on people recommending regular rebuild/never rebuilding/re-building if there are problems etc..

We have an OLTP system with around 1000 tables and approximately 500 indexes, overnight there is some batch processing/backups etc that occur.

My questions if someone can help answer is:

1)     Is a regular (monthly) rebuild of indexes a good thing? Not worth it? or Don't do it?

2)     We have a few tables that become very large, fragmented inserts/updates on these tables causing chained rows. We usually fix this by moving the table into a new tablespace and rebuilding the indexes on this table. Is this best practice?

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