optimizer time reported as?

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optimizer time reported as?

optimizer time reported as?

2006-01-11 - By Wolfson Larry - lwolfs

Reply: 1 2 3 4 5 6 7 8 9 10

Mark,
I didn't ask to have it changed yet. That's why I was asking if
time is accounted for in the Parsing SQL time and not somewhere else.

Another client has several applications where their test systems have
one setting and their production another.
I don't think that's particularly good for plan consistency. Especially
when they complain that code runs differently in production.

By the way, did the 2000 under 817 significantly help your 4031s?

Thanks
Larry

__ ____ ____ ____ ____ ____ ____

From: oracle-l-bounce@(protected)
[mailto:oracle-l-bounce@(protected)] On Behalf Of Powell, Mark D
Sent: Wednesday, January 11, 2006 3:11 PM
To: oracle-l@(protected)
Subject: RE: optimizer time reported as?

I remember the default on 8.1.7 being 80,000 and Oracle support had us
lower it to 2,000 while we were working on an ORA-04031 (See ORA-04031.ora-code.com) iTAR.

ora817 > @(protected)/parms
'For all columns: Y = Yes/True N = No/False '
' D = Deferred, I = Immediate, S = System, U = User session'
' Default indicator is unreliable if col SYS indicates chg '
Enter value for parameter: optimizer_max_permutations

D S
S M A
e e
y o d
NAME VALUE f s
s d j
-- ---- ---- ---- ---- ---- --- -- ---- ---- ---- ---- ---- ---- -- - -
- - -
DESCRIPTION
-- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ------
optimizer_max_permutations 80000 Y Y
N N N
optimizer maximum join permutations per query block

So how did the performance test turn out?

HTH -- Mark D Powell --

__ ____ ____ ____ ____ ____ ____

From: oracle-l-bounce@(protected)
[mailto:oracle-l-bounce@(protected)] On Behalf Of Wolfson Larry -
lwolfs
Sent: Wednesday, January 11, 2006 4:01 PM
To: oracle-l@(protected)
Subject: optimizer time reported as?

I got asked about performance on a database that was recently
upgraded from 8.1.7.4 to 9.2.0.6.

Looking at the initora I noticed
optimizer_max_permutations integer
79999

The DBA doing the upgrade said she only changed the
parmaeters relating to the upgrade.
I know the default changed from 8's 80000 to 9's 2000 and there
was an earlier TAR telling us to change the
80000 to 79999.

I thought this might be an issue and I ran Tim Gorman's
sp_time script to see where the overhead was.
I just wanted to verify that the optimizer_max_permutations time
is accounted for in the
Parsing SQL time and not somewhere else.

TIA
Larry Wolfson

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD><TITLE>Re: Rman/NetBackup problem</TITLE>
<META http-equiv=Content-Type content="text/html; charset=us-ascii">
<META content="MSHTML 6.00.2800.1528" name=GENERATOR></HEAD>
<BODY>
<DIV dir=ltr align=left><SPAN class=581281522-11012006><FONT face=Arial
color=#0000ff size=2>Mark,</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=581281522-11012006><FONT face=Arial
color=#0000ff size=2>    I didn't ask to have it changed
yet.  That's why I was asking if time is accounted for in the <SPAN
class=350444120-11012006>Parsing SQL time and not somewhere
else.</SPAN></FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=581281522-11012006><FONT face=Arial
color=#0000ff size=2><SPAN
class=350444120-11012006></SPAN></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=581281522-11012006><FONT face=Arial
color=#0000ff size=2><SPAN class=350444120-11012006>Another client has several
applications where their test systems have one setting and their production
another.</SPAN></FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=581281522-11012006><FONT face=Arial
color=#0000ff size=2><SPAN class=350444120-11012006>I don't think that's
particularly good for plan consistency.  Especially when they complain
that
code runs differently in production.</SPAN></FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=581281522-11012006><FONT face=Arial
color=#0000ff size=2><SPAN
class=350444120-11012006></SPAN></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=581281522-11012006><FONT face=Arial
color=#0000ff size=2><SPAN class=350444120-11012006>By the way, did the 2000
under 817 significantly help your 4031s?</SPAN></FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=581281522-11012006><FONT face=Arial
color=#0000ff size=2><SPAN
class=350444120-11012006></SPAN></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=581281522-11012006><FONT face=Arial
color=#0000ff size=2><SPAN class=350444120-11012006>   
Thanks</SPAN></FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=581281522-11012006><FONT face=Arial
color=#0000ff size=2><SPAN class=350444120-11012006>   
Larry</SPAN></FONT></SPAN></DIV><BR>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> oracle-l-bounce@(protected)
[mailto:oracle-l-bounce@(protected)] <B>On Behalf Of </B>Powell, Mark
D<BR><B>Sent:</B> Wednesday, January 11, 2006 3:11 PM<BR><B>To:</B>
oracle-l@(protected)<BR><B>Subject:</B> RE: optimizer time reported as?
<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=090070821-11012006>I remember the default on 8.1.7 being 80,000 and
Oracle
support had us lower it to 2,000 while we were working on an ORA-04031 (See ORA-04031.ora-code.com)
iTAR.</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=090070821-11012006></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face="Courier New" color=#0000ff size=2><SPAN
class=090070821-11012006>ora817 > @(protected)/parms<BR>'For all columns: Y =
Yes/True    N = No/False '<BR>' D = Deferred,  I =
Immediate,  S = System,  U = User session'<BR>' Default indicator is
unreliable if col SYS indicates chg '<BR>Enter value for parameter:
optimizer_max_permutations</SPAN></FONT></DIV>
<DIV><FONT face="Courier New"></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=090070821-11012006><FONT
face="Courier New">          
             
             
             
             
     
D S S M
A<BR>            
             
             
             
             
   
e e y o
d<BR>NAME           
             
   
VALUE            
             
     
f s s d j<BR>-- ---- ---- ---- ---- ---- --- -- ---- ---- ---- ---- ---- ------
-
- - - -
-<BR>DESCRIPTION<BR>-- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ------
-- --<BR>optimizer_max_permutations     
80000            
             
     
Y Y N N N<BR>optimizer maximum join permutations per query
block</FONT><BR></SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=090070821-11012006></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=090070821-11012006>So how did the performance test turn
out?</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=090070821-11012006></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=090070821-11012006>HTH -- Mark D Powell --</DIV></SPAN></FONT><BR>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> oracle-l-bounce@(protected)
[mailto:oracle-l-bounce@(protected)] <B>On Behalf Of </B>Wolfson Larry -
lwolfs<BR><B>Sent:</B> Wednesday, January 11, 2006 4:01 PM<BR><B>To:</B>
oracle-l@(protected)<BR><B>Subject:</B> optimizer time reported as?
<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=350444120-11012006>I got asked about performance on a database that was
recently upgraded from 8.1.7.4 to 9.2.0.6.</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=350444120-11012006></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=350444120-11012006>Looking at the initora I noticed</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=350444120-11012006>optimizer_max_permutations    
      
integer           
             
 
79999</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=350444120-11012006></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=350444120-11012006>    The DBA doing the upgrade said
she
only changed the parmaeters relating to the upgrade.</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=350444120-11012006>I know the default changed from 8's 80000 to 9's
2000
and there was an earlier TAR telling us to change the </SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=350444120-11012006>80000 to 79999.</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=350444120-11012006></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=350444120-11012006>    I thought this might be an issue
and I ran Tim Gorman's sp_time script to see where the overhead
was.</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=350444120-11012006>I just wanted to verify that the
optimizer_max_permutations time is accounted for in
the </SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=350444120-11012006>Parsing SQL time and not somewhere
else.</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=350444120-11012006></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=350444120-11012006></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=350444120-11012006>    TIA</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=350444120-11012006>    Larry Wolfson</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=350444120-11012006>    </SPAN></FONT></DIV><PRE>********
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The information contained in this communication is confidential, is
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hereby notified that any dissemination, distribution or copying of this
communication is strictly prohibited.

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of it from your computer system.

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