RE: Trace file does not list detailed timings

Be aware of bug 3009359.

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

Hotsos Symposium 2006 / March 5-9 / Dallas Visit www.hotsos.com for curriculum and schedule details...

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

From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Jonathan Lewis Sent: Friday, January 27, 2006 4:43 PM
To: oracle-l_at_freelists.org
Subject: Re: Trace file does not list detailed timings

Is this a case of: 9i and

    It used to show stats when I switched on SQL_TRACE,     but it doesn't any more after an upgrade.

If so, then it's a change in default behaviour. In earlier versions of 9, when you enabled sql_trace, you implicitly enabled "_rowsource_execution_statistics". The most recent versions don't do this. If you want them, then

    alter session set "_rowsource_execution_statistics"=true;

The cost is significant in some classes of query - nested loops seem to be the worst. I have an example where the CPU time goes up by a factor of three when stats are on.

Regards

Jonathan Lewis

http://www.jlcomp.demon.co.uk/faq/ind_faq.html The Co-operative Oracle Users' FAQ

http://www.jlcomp.demon.co.uk/cbo_book/ind_book.html Cost Based Oracle: Fundamentals

http://www.jlcomp.demon.co.uk/appearances.html Public Appearances - schedule updated 10th Jan 2006

• Original Message ----- From: <Jill.Drocea_at_VerizonWireless.com> To: <oracle-l_at_freelists.org> Sent: Friday, January 27, 2006 10:31 PM Subject: Trace file does not list detailed timings

My trace file does not contain details...i.e.

TABLE ACCESS BY INDEX ROWID OTAPA_REQUEST_QUEUE (cr=2 pr=0 pw=0 time=91 us)

Instead shows

TABLE ACCESS BY INDEX ROWID OTAPA_REQUEST_QUEUE What am I missing?

Jill Drocea
Oracle DBA
Verizon Wireless
845-365-7465
Jill.Drocea_at_verizonwireless.com

The information contained in this message and any attachment may be proprietary, confidential, and privileged or subject to the work product doctrine and thus protected from disclosure. If the reader of this message is not the intended recipient, or an employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please notify me immediately by replying to this message and deleting it and all copies and backups thereof. Thank you.

--

http://www.freelists.org/webpage/oracle-l

--

http://www.freelists.org/webpage/oracle-l

--

http://www.freelists.org/webpage/oracle-l Received on Sat Jan 28 2006 - 13:55:09 CST