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Message Posted: Mon, 28 Mar 2005 @ 19:32:31 GMT


     
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Subj:   Re: Statistics Help
 
From:   GORRELLA, SRINI

Yes I'm using this from past 6 months ...I cannot say its 100 % useful but it will give you enough information for missing stats . It recommends you to collect too many stats ...If you are tables are huge ,COLLECT STATS might run for long time ..So its better to switch to SAMPLE STATS .

DR86230 implemented a diagnostic to get a statistics recommendation by optimizer at query level. With this new feature, we can easily find the missing stats. DR86230 is available at the following version and higher.

- PTDBMS.05.00.02.30
- PTDBMS.05.00.03.20
- PTDBMS.05.01.00.18
- PTDBMS.05.01.01.09


It works like this ;

     BTEQ -- Enter your DBC/SQL request or BTEQ command:

     diagnostic helpstats on for session;
     explain
     Select * from ..... ;

Thanks,

Srini



     
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