RE: Rollback too small... on analyze???

From: Powell, Mark D <mark.powell_at_eds.com>
Date: Mon, 16 Feb 2004 09:32:04 -0500
Message-ID: <564DE4477544D411AD2C00508BDF0B6A1CE0A9EB@USAHM018.amer.corp.eds.com>

I would suspect delayed block cleanout is responsible for the 1555 error. Try running a select * first, or switch from a compute to an estimate which because of how it works reduce the frequency of the error occurring.

-----Original Message-----

From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org]On Behalf Of Michael Kline Sent: Saturday, February 14, 2004 9:29 AM To: oracle-l_at_freelists.org
Subject: Rollback too small... on analyze???

Oracle 8.1.7.4 on HP-UX.

I've got a client trying to insert into large tables in batches of 5 million rows which is taking about 20 minutes per 5 million. No problem there.

The problem seems to be that he runs an analyze compute statistics afterwards and about 1 out of 5 times he gets a rollback segment too small. I wouldn't think analyze uses rollback.. It happens so infrequently and ALWAYS seems to work if they simply run it again.

What I suspect, though have no way to prove, is that the rollbacks are still dumping out after the last batch of inserts and the analyze gets a bit confused on this.

I have suggested they put a 3-5 minute "wait" before they run the analyze and see if that clears the problem up.

Is there any firm foundation to this?

What might be cause this?

The only other process running at the time was another insert batch on a different table.

Michael Kline, Principal Consultant
Business To Business Solutions, LLC
Richmond, VA
804-744-1545

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Received on Mon Feb 16 2004 - 08:32:04 CST