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  1. #1
    Join Date
    Sep 2003
    Location
    canada
    Posts
    230

    Unanswered: how can I use EXPLAIN tables for query access plan characteristics

    Hi
    I am working with db2v8.2.2 and aix 5.2

    recently I encountered with performance issue in production after weekly maintenance (reorg, runstats and bind) it seems to me access plan for some packages has been changed.

    I am thinking to query EXPLAIN tables before bind and after bind and retrieve the difference between to access plan. is it possible ? and how can I do that?any help is really appreciated.

  2. #2
    Join Date
    Apr 2006
    Location
    Belgium
    Posts
    2,514
    Provided Answers: 11

    explain

    the plantable would be the best table to look for
    access method is indicated - you could check if I (index) is used or table scan ....
    Best Regards, Guy Przytula
    Database Software Consultant
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  3. #3
    Join Date
    Sep 2003
    Location
    canada
    Posts
    230
    Quote Originally Posted by przytula_guy
    the plantable would be the best table to look for
    access method is indicated - you could check if I (index) is used or table scan ....
    Thank you przytula_guy for your response.

    what is "plantable" I searched and I could not find the table, all table I can find is as follow:
    EXPLAIN_ARGUMENT
    EXPLAIN_INSTANCE
    EXPLAIN_OBJECT
    EXPLAIN_OPERATOR
    EXPLAIN_PREDICATE
    EXPLAIN_STATEMENT
    EXPLAIN_STREAM

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