RE: CTX Indexes

Hmmm...do you mean CTX_DDL.SYNC_INDEX (sans "RE")? For a minute there, I thought I was running the wrong procedure. BTW, we run it every minute for an index whose key changes about 100 times/day the last I checked. There's no discernable overhead for us on a 4-way HP L3000 w/8GB RAM and about 300 total concurrent DB connections.

Rich

-----Original Message-----
From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Peter.Hitchman_at_thomson.com
Sent: Wednesday, May 25, 2005 10:42 AM
To: oracle-l_at_freelists.org
Subject: RE: CTX Indexes

Hi,
You need to run RESYNC_INDEX so that inserts and updates are reflected = in the index. So how often and when you run this depends on your = application. For the one I worked on the system was a kind of backend = data mart so I had the RESYNC happening as part of the loading process,
=

which was a regular batch process.

As the index is updated for DML it becomes fragmented, since what is = doing is storing what terms are in what indexes and in common with other
=

text search engines, Oracle does not try to optimize the storage of this
=

information on the fly, that is just too expensive. So to fix this you use the OPTIMIZE_INDEX procedure. This has a few = options about how aggressive you want it to be. As with most other = things, how and how often you run this will depend on your application.

I recommend the Oracle Notes on MetaLink:- = 120609.1,120610.1,120611.1,104262.1,150307.1,221940.1 and anything else
=

written by Roger Ford.

Regards

Pete

-----Original Message-----
From: Mercadante, Thomas F (LABOR)
[mailto:Thomas.Mercadante_at_labor.state.ny.us] Sent: 25 May 2005 16:04
To: Hitchman, Peter (TS UK); oracle-l_at_freelists.org Subject: RE: CTX Indexes

Peter,

Speaking of CTX_DDL.OPTIMIZE_INDEX, do you remember if I should run that procedure regularly or CTX_DDL.RESYNC_INDEX? Should I run them both?

Thanks

Tom

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