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Thread: When to use Index Compress

  1. #1
    Join Date
    Sep 2000
    Posts
    384
    When should one use the compress option while creating a index .

    In my have I have table with 52Million records .
    OLTP database ..
    40 distinct values are there in the column ..
    Since being OLTP i cannot use BitMAP indexes ...

    Under this condition Can I use the Index compress ..
    What will be advantages ....


    CREATE INDEX idx_EMP on EMP (DEPTNO) COMPRESS
    Radhakrishnan.M

  2. #2
    Join Date
    Oct 2000
    Location
    Saskatoon, SK, Canada
    Posts
    3,925
    Thanx
    Sam



    Life is a journey, not a destination!


  3. #3
    Join Date
    Dec 2000
    Location
    Ljubljana, Slovenia
    Posts
    4,439
    Sure, compressed index would make *a huge* difference in your case compared to a normal index!

    But to be honest, I can't imagine why would you need an index on such low cardinality column in an OLTP system anyway... Any particular reason why you need index on that column?
    Jurij Modic
    ASCII a stupid question, get a stupid ANSI
    24 hours in a day .... 24 beer in a case .... coincidence?

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