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RE: Insert performance

From: Cary Millsap <cary.millsap_at_hotsos.com>
Date: Tue, 23 Sep 2003 14:19:47 -0800
Message-ID: <F001.005D0DB3.20030923141947@fatcity.com>


Rick,  

Find out what kind(s) of buffer busy waits you have. MetaLink, Anjo Kolk's YAPP paper, or Steve Adams's book can tell you how to read the p1, p2, p3 values on the waits you see. Then eliminate the motive for the waits. The same documents will tell you how.  

Cary Millsap
Hotsos Enterprises, Ltd.
http://www.hotsos.com

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-----Original Message-----
Rick Stephenson
Sent: Tuesday, September 23, 2003 4:05 PM To: Multiple recipients of list ORACLE-L  

I have already bumped that up quite a bit as well, but I still get many waits.  

Thanks,  

Rick Stephenson

Oracle Database Administrator

Ovid Technologies, Inc.

rick_stephenson_at_ovid.com  

-----Original Message-----
Sent: Monday, September 22, 2003 11:10 PM To: Multiple recipients of list ORACLE-L  

At 09:44 PM 9/22/2003, you wrote:

Does anyone have any idea how to improve performance for multiple inserts into a table that uses a sequence generated primary key?

Is the sequence cache set to an appropriately large value?

Justin Cave  

I have approximately 6 concurrent inserts per second into this table which causes the primary key index to become a hot block. This in turn causes "buffer busy waits".  

I have increased initrans, but am not sure where to go from here  

Any ideas would be appreciated,  

Thanks,  

Rick Stephenson
Oracle Database Administrator
Ovid Technologies, Inc.
rick_stephenson_at_ovid.com  

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Justin Cave
Distributed Database Consulting

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Please see the official ORACLE-L FAQ: http://www.orafaq.net
-- 
Author: Cary Millsap
  INET: cary.millsap_at_hotsos.com

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Received on Tue Sep 23 2003 - 17:19:47 CDT

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