how to estimate table size
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Thread: how to estimate table size

  1. #1
    Join Date
    Aug 2000
    Posts
    163
    Hello friends,
    I need to load data from a temporary table I created as a result of loading data from a text file to a real production table which I still need to create. This new production table won't grow, i.e. no inserts, no updates expected.
    I am thinking about creating just one extent equal to the size of my temporary table. That case I'll use my storage efficiently.
    How do I estimate the size of the extent I need? I already analyzed my temp table. Would it be avg_row_len*num_rows?
    Any suggestions welcome.
    Thank you.

  2. #2
    Join Date
    Jun 2000
    Posts
    417
    average row length in bytes * num rows will give you an estimate of how many bytes the table is. you'll probablly want to create it with a bit more space for safety and possible unforseen updates but in general that will give you a good estimate.

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