RE: dbms_stats

The answer is as usual "it depends". If the table has a reasonably uniform row size and the blocks are approximately evenly utilized, then the analyze can extrapolate the total number of rows fairly accurately even from a small sample. However, if the row size fluctuates wildly, or if the block utilization fluctuates heavily, then you need a larger sample for accurate estimates of the totals.

At 12:14 PM 5/29/2003 -0800, you wrote:
>Hi Wolfgang,
>
>In the grand scheme of things, that probably isn't awful. However, if the
>analyze can't get the row count right (how easy is that?) then how can I
>trust it to get the rest of the statistics correct? Just my two cents.
>
>Thanks for your reply.
>Lisa

Wolfgang Breitling
Oracle7, 8, 8i, 9i OCP DBA
Centrex Consulting Corporation
http://www.centrexcc.com

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