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Thread: BLOBs and LOBs

  1. #1
    Join Date
    Nov 2000
    Is there a limitation on the number of BLOB or LOB columns in an Oracle 8.1.7 table?


  2. #2
    Join Date
    Jan 2002
    Up s**t creek
    There is no limitation on the number of LOB, BLOB columns per table except the normal column limits for a table. the there is a limitation on size (4Gb I seem to recall)

    Hope that makes sense

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  3. #3
    Join Date
    May 2001

    how to make blob & clob more efficient?

    yes, 4GB is the limit for blob and clob.

    BTW -- do you guys know any tip when using blobs and clobs? I mean, how do make sure the system's overall performance when using the b/clobs? Since I am going to work on a project using b/clobs extensively, I'd like to know what should I do during the design time to make sure they won't drag the overall performance.


  4. #4
    Join Date
    Jan 2001
    Hey Elaine;
    As luck would have it I am studying for the 8i upgrade exam and there is an entire chapter on LOB's. Do you have this ILT?
    You will find guidlines for caching or nocacheing options, using temporary LOB's, internal LOB's and the like.
    I just started reading this and really have no experience with LOB's so there is only so much I can do to help. If you can get your hands on chapter 6 of the ILT I'm sure it will help you out.

    I remember when this place was cool.

  5. #5
    Join Date
    May 2001

    Thanks MH, but...

    I am only on my 2nd OCP exam (AA), so I haven't seen much of LOBs yet. Do LOBs appear in Performance Tuning?

    Thanks for the info!

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