RE: Analyze is taking lot of time for a set of tables in particular schema

As far as I know there is no need for deleting statistics before generating it.  

Regards,

Harshan  

From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Shastry(DBA) Sent: Monday, February 09, 2009 3:02 PM
To: Syed Jaffar Hussain
Cc: oracle-l
Subject: Re: Analyze is taking lot of time for a set of tables in particular schema  

Should I drop the statistics and then I need to run freshly dbms_stats or what do you suggest? Sorry If I am wrong.  

Thanks,

Ann

On Mon, Feb 9, 2009 at 1:08 PM, Syed Jaffar Hussain
<sjaffarhussain_at_gmail.com> wrote:

Oh man. You are collecting 100% stats, and if the table size is larger, it gonna take time.

I strongly recommend you to use dbsm_stats with estimate percent 10%, that would be good to start with.  

You can use the following command to use dbms_stats with 10% statistics collection.  

exec
dbms_stats.gather_tablespace('USERNAME','TABLENAME',estimate_percent=>10 );  

Regards,  

Jaffar  

On Mon, Feb 9, 2009 at 10:33 AM, Shastry(DBA) <shastry17_at_gmail.com> wrote:

Hello Syed,  

Thanks for the quick reply.  

Here are the details:  

Oracle database version : 9.2.0.6

OLTP database  

I am using ANALYZE TABLE <table_name> COMPUTE STATISTICS;  

Please advice.  

Thanks,

Ann  

On Mon, Feb 9, 2009 at 12:26 PM, Syed Jaffar Hussain
<sjaffarhussain_at_gmail.com> wrote:

Very insufficient information provided. What is your db version? are you collecting 100% stats? What is the size of your db?

is it OLTP or DW? Database?

Why don't you use dbms_stast rather than analyze?  

Regards,  

Jaffar  

On Mon, Feb 9, 2009 at 9:51 AM, Shastry(DBA) <shastry17_at_gmail.com> wrote:

Hi all,  

Analyze is taking too much time on particular schema(PROD database), i see the latest time stamp in last_analyzed column. But these days the gather stats is taking too much time. Any workarounds on this please. It will be grateful.  

Thanks in advance,

Ann

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Best Regards,

Syed Jaffar Hussain
Oracle Certified Master (10g)
http://www.oracle.com/technology/ocm/shussain.html
Oracle ACE
http://apex.oracle.com/pls/otn/f?p=19297:4:1579866181463918::NO:4:P4_ID:
126
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(http://www.oracleracsig.org/)
I blog at
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--------------------
"Winners don't do different things. They do things differently."

 




-- 
Best Regards,

Syed Jaffar Hussain
Oracle Certified Master (10g)
http://www.oracle.com/technology/ocm/shussain.html
Oracle ACE
http://apex.oracle.com/pls/otn/f?p=19297:4:1579866181463918::NO:4:P4_ID:
126
OCP 8i,9i & 10g DBA
RAC Certified Expert
Official Oracle RAC SIG Representative for Saudi Arabian region
(http://www.oracleracsig.org/)
I blog at
http://jaffardba.blogspot.com/
--------------------
"Winners don't do different things. They do things differently."

 


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