RE: Statistics for CBO

RE: Statistics for CBO

 

  

hi Deepak,

To generate statistics for a table with analyze is used and analyze give
the overhead. Analyzing a table is equivalent to building an index. An
exclusive lock is taken on the table, preventing any DML updates until the
ANALYZE has completed.More suprising is the amount of temporary disk space
required.

SO if frequently you generate the statistics it will effect the performance
of your database only becuase analyze commmand.

it is depend you table size. If it is small then you can generate
statistics.

with regards

Deepesh

Agilisys

-----Original Message-----
From: Deepak Panda [mailto:[Email Address Removed] Friday, February 27, 2004 6:34 PM
To: LazyDBA.com Discussion
Subject: Statistics for CBO


Hi Gurus,

Will it be benificial if I collect statistics for a table which grows at
a very faster rate?

I am asking this because if i do this then i may need to collect the
statistics quite frequently, so that the CBO can take the right
decission while executing any query on the table.

Can someone please throw some light on it?

Thanks & Regards

Deepak
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