RE: analyze table takes forever

Thanks a lot to all who replied !
Cheers !
Andrey.  

-----Original Message-----
Sent: Tuesday, October 29, 2002 9:00 PM
To: Multiple recipients of list ORACLE-L  

You mentioned that count(*) took 10 minutes but did not say how many rows are present in that partition; if number of rows is less than 1 million, I would do the following.  

alter table <owner>.<table_name> move partition <partition_name> tablespace
<tablespace_name> nologging;
 

and then re-analyze the table partition.  

We have seen a significant improvement in runtimes when we set the sort_area_size to 50Mb while doing these kinds of operations.  

Also, I read in metalink sometime back that there is a known bug if you estimate less than 20%.  

Hope this helps.  

Govind  

-----Original Message-----
Sent: Tuesday, October 29, 2002 1:25 PM
To: Multiple recipients of list ORACLE-L what's the structure of the table?
And try taking an export of this partition and import it into it's own table in a development box... see if you can analyze it there. Nick
-----Original Message-----
<mailto:andreyb_at_elrontelesoft.com> ]

Sent: Tuesday, October 29, 2002 7:49 AM To: Multiple recipients of list ORACLE-L  

Dear gurus !
We are trying to analyze a table partition (estimate 2 %) and it takes forever.
analyze table ... partition (P20021022) estimate statistics sample 2 percent;
For instance, select count(*) from the same partition takes 10 minutes , but

the analyze takes literally infinite amount of time , once i left it to run for half a day and killed it since it did not finish Even when i do analyze ... estimate statistics sample 100 rows; , it takes almost 2 minutes to ananlyze 100 rows.
Any ideas ?
It's Oracle 8.1.6 on an expensive 6 CPUs HP machine with EMC storage. Thanks a lot in advance.  

DBAndrey

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* 058-548133 
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