| Index Creation Speed-up [message #180308] |
Mon, 03 July 2006 01:08  |
ithanver
Messages: 2
Registered: July 2006
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Junior Member |
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Hi.
I need to create a dozen of bitmap indexes on a very large table, containing about 350 million records and 30 GB in size.
Table is range partitioned by month. I ran the CREATE INDEX statement with NOLOGGING and PARALLEL options but it took more than 2 days just for one index to be created. I don't know if it's Ok or not, but the processes wait for "library cache lock" event. The time it takes is absolutely unacceptable. Any suggestions how to speed up the process?
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| Re: Index Creation Speed-up [message #180331 is a reply to message #180308] |
Mon, 03 July 2006 02:26  |
rleishman
Messages: 3728
Registered: October 2005
Location: Melbourne, Australia
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Senior Member |
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Totally guessing here, but you were creating the indexes NOLOGGING and PARALLEL one at a time, right?
I'm not really across the Library Cache Lock wait event, but my reading of doco makes me think that creating indexes concurrently on the same table is the sort of thing that might trigger it.
There are references to Library Cache Lock here and here, but they require some deeper understanding that I don't have.
Also, did you Locally Partition the indexes?
Ross Leishman
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