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Oracle Uniform Extent Size

Oracle Database Tips by Donald Burleson



When using Oracle 10g with uniform extents, how many extents should compose a table? Or stated another way, how many blocks should compose an extent? I understand that if I opt to use a one megabyte extent size and the data that will compose the table is 50 megabytes, I will end up with 50 extents. Please correct me if I'm wrong on this. I have looked in many places on the web to find this answer but still have not. Thank you greatly for any help.

This question posed on 17 November 2005


As he has surmised you take the table size divided by the uniform extent size and it should give the number of extents. If you use auto allocate instead it uses a sliding size based on the size of the table specified.



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