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Number of data CA is greater than number of Index records!

 
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Pradip kumar Mohanty

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Joined: 16 Sep 2007
Posts: 33
Location: India

PostPosted: Thu Apr 26, 2012 12:23 pm    Post subject: Number of data CA is greater than number of Index records!
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What are the performance implications with "Number of data CA is greater than number of Index records" ?
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Robert Sample

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Joined: 06 Jun 2008
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Location: Dubuque, Iowa, USA

PostPosted: Thu Apr 26, 2012 2:33 pm    Post subject:
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There's not much of a performance impact -- it just means that some of your DATA CI cannot be accessed, so the data set will be larger than it would be if the INDEX CI size were set correctly.
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Pete Wilson

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Joined: 31 Dec 2009
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PostPosted: Thu May 03, 2012 1:28 pm    Post subject:
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What level of Z/OS are you on, this issue was eliminated in around v1.10 or so I thought.

Having a larger INDEX CISIZE can help especially if you have long keys, but I'm sure in later releases DFP will ensure the INDEX CI's are large enough so that all DATA CI's can be referenced.
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