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Thread: Materialized View Estimation

  1. 05-04-2007, 10:48 PM #1
    dinesh_hm
    dinesh_hm is offline Junior Member
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    Materialized View Estimation

    Hi,

    What is the best way of estimating the size for a MV before it's creation

    I have to create an MV of a table located on remote database
    which will be an exact replica of the master table (all columns)
    with a fast refresh.

    I have tried using the dbms_olap.est_mview_size pkg
    but it does not give me any value

    Thnx in advance
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  2. 05-05-2007, 09:17 AM #2
    slimdave
    slimdave is offline Foreign Script Kiddie
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    With it being an exact replica the only variables are the storage (pctfree / pctused / block size etc) so i don't see how this is difficult at all
    David Aldridge,
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  3. 05-05-2007, 12:08 PM #3
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    PAVB
    PAVB is offline Senior Advisor
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    Did you said your MV will be an "exact replica" of the master table?

    You can be sure your MV is not going to be larger than your base table, probably smaller. How smaller? ... it depends of how much wasted space you have in your base table 'cause of fragmentation.
    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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