RE: dbms_utility and dbms_stat difference

Hi, Madhavan,

 Thanks all for the clraification.

Just wonder whether "analyze table <name> estimate statistics" generates the stats at partition level. But for sure, it does not generate the stats at table level. Please correct me if wrong.

As Connor said, dbms_stats runs a lot heavier than analyze, I think, it's because it gathers the stats at table and partition level and related indexes.

In brief, I prefer to choose "analyze .. estimate statistics" for non-partition table and dbms_stats for partitioned table.

Chuan

-----Original Message-----
Sent: Thursday, 22 August 2002 5:04 AM
To: Multiple recipients of list ORACLE-L

Hi Cherie,

> I can't speak for dbms_utility but dbms_stats is supposed to generate
> statistics at both the partition level and at the table level for
> partitioned tables, which analyze does not do.

A small correction, ANALYZE also generates statisics at partition level and when an "analyze table <name> compute statistics" is done it generates statistics for the partitions. Analyze can also be run at the partition level as "analyze table <name> part (<pname>) compute statistics" and this will generate statistics only for that paritition.
Its very useful as analyze can be run for the partitions of a table in parallel and so its a blessing when running analyze on huge partitioned tables.

One of the big differences between analyze and dbms_stats is that analye cannot be run in parallel on a non partitioned table and definitely runs better in my opinion in general.

Hope this helps.
Regards,

Madhavan
http://www.dpapps.com

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Madhavan Amruthur
DecisionPoint Applications

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Author: Chuan Zhang
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