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RE: Overparsing issue

From: Majid Kazemi <Mkazemi_at_teranet.on.ca>
Date: Mon, 4 Dec 2000 10:20:06 -0500
Message-Id: <10700.123528@fatcity.com>


Hi guy:
Thanks for your response; I have noticed the analyzer has been run and the statistics are available to Oracle optimizer. Also the OPTIMIZER_MODE=CHOOSE init.ora file. So, I believe this could be the source of the problem. I am hopping by deleting statistics the issue will be resolved. I have used the sql_trace utility and tkprof and also used the sql autotrace on. I welcome any other suggestion.

Thanks again.
Majid Kazemi

	-----Original Message-----
	From:	djordjej [SMTP:djordjej_at_home.com]
	Sent:	Sunday, December 03, 2000 9:40 PM
	To:	Multiple recipients of list ORACLE-L
	Subject:	Re: Overparsing issue

	How do you know that this is parsing - have you traced the
session(s) ?  If
	it is parsing you should have the problem with shared pool, although
95% hit
	ratio is fine.  And btw, indexes has nothing to do with parsing.

	If it is not parsing but fetch time - have you analyzed the query
that takes
	that long ?  Is it using the indexes ?  Which optimizer are you
using.  If
	you have been using rule - have you may be analyzed some of the
tables that
	are queried ?  If you have been using cost - have statistics changed
	considerably ?  What is you db block buffer hit ratio ?

	Djordje

	----- Original Message -----
	To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>
	Sent: Sunday, December 03, 2000 5:20 PM



> Hi Oracle Guru:
>
> I have an oracle version 7.3.4 database on NT 4.0. Since last week
the CPU
> time for parsing has been dramatically increased. A query which
only took
> 4 microseconds, now it takes 7-8 seconds before completed. The
share pool
> size is relatively okay. It is 20MB. There is waiting . The hit
ratio is
> almost 95%. I dropped and recreated indices with the hope that
something
> would change. It stills the same. From my understanding nothing
major has
> been changed from the OS side. Excepts two dll upgraded to the
newer
> version.
> I need your help. Please let me know if you have had such an
experience or
> any information which help me to understand and resolve this
problem. Your
> help on this matter highly appreciated. .
>
> Thanks;
> Majid Kazemi
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.com
> --
> Author: Majid Kazemi
> INET: Mkazemi_at_teranet.on.ca
>
> Fat City Network Services -- (858) 538-5051 FAX: (858)
538-5051
> San Diego, California -- Public Internet access / Mailing
Lists
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	-- 
	Author: djordjej
	  INET: djordjej_at_home.com

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Received on Mon Dec 04 2000 - 09:20:06 CST

Original text of this message

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