Oracle FAQ Your Portal to the Oracle Knowledge Grid
HOME | ASK QUESTION | ADD INFO | SEARCH | E-MAIL US
 

Home -> Community -> Mailing Lists -> Oracle-L -> RE: 10046 event is useless in 9.2.0.4 version for response time measuring !!!

RE: 10046 event is useless in 9.2.0.4 version for response time measuring !!!

From: <J.Velikanovs_at_alise.lv>
Date: Mon, 2 Aug 2004 18:45:33 +0300
Message-ID: <OF25F4C6D2.6C2046B3-ONC2256EE4.0055C87D-C2256EE4.00575151@alise.lv>


Cary,
Thanks for your replay,
But that the …
How to discover performance problems on 9.2.0.4, then? It is seem that 9.2.0.5 not the option ;(
.

Is to ask backport is a good idea in this case, I wonder. Does some body in the list have tried it?
.

Cary, that is your experience? How to get around it?
.

PS Forgot to mention, test has been executed on the one machine. Two separate OH. RH AS 3.0.

Regards,
Jurijs
9268222



http://otn.oracle.com/ocm/jvelikanovs.html

"Cary Millsap" <cary.millsap_at_hotsos.com> Sent by: oracle-l-bounce_at_freelists.org
02.08.2004 18:07
Please respond to oracle-l  

        To:     <oracle-l_at_freelists.org>
        cc: 
        Subject:        RE: 10046 event is useless in 9.2.0.4 version for 
response time measuring !!!

Jurijs,

You've identified the bug correctly. The response time impact will vary = from
virtually zero to the 6X number you've discovered, or even worse. (The problem is the worst for sessions that nest NESTED LOOPS row source operations inside each other.)

It's a bug. Fix it. The problem is fixed in 9.2.0.5.

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

Upcoming events:
- Performance Diagnosis 101: 8/10 Boston, 9/14 San Francisco, 10/5 = Charlotte
- SQL Optimization 101: 7/26 Washington DC, 8/16 Minneapolis, 9/20 = Hartford
- Hotsos Symposium 2005: March 6-10 Dallas - Visit www.hotsos.com for schedule details...

-----Original Message-----
From: oracle-l-bounce_at_freelists.org =
[mailto:oracle-l-bounce_at_freelists.org]
On Behalf Of J.Velikanovs_at_alise.lv
Sent: Monday, August 02, 2004 8:19 AM
To: 'oracle-l_at_freelists.org '
Subject: 10046 event is useless in 9.2.0.4 version for response time measuring !!!

My regards to all,
At the moment I have impression that, 10046 event is useless in 9.2.0.4=20 version for response time measuring!
I have tied to run loop.sql (see below for full text) with and without=20 10046 event on 9.2.0.4 & 9.2.0.5.
The results scared me.
Take a look:
.

9.2.0.4=20
without 6,45 sec=20
!!!!!!!!!!! with 37,36 sec=20
.

9.2.0.5
without 5,48 sec=20
!!!!!!!!!!! with 7,19 sec
.

After short investigation it is appears that it is BUG 3009359. http://metalink.oracle.com/metalink/plsql/showdoc?db=3DNOT&id=3D3009359.8=

No one-off fix on 9.2.0.4.
.

So it's appears, that 10046 is useless on 9.2.0.4, because SQL Trace=20 itself takes 580% of response time.
.

Any comments?!
Have any body solution for this issue.
.

As appears from dictation from this list, to go to 9.2.0.5 is not good=20 idea, because of instability and other issues.

Thanks in advance,
Jurijs


TKPROF output



9204

SELECT count(v)
from
 testlio where n between 10000 and 20000

call count cpu elapsed disk query current = rows
------- ------ -------- ---------- ---------- ---------- ----------=20



Parse 1 0.00 0.00 0 0 0 = 0
Execute 1000 0.08 0.08 0 0 0 = 0
Fetch 1000 37.07 36.19 0 132000 0 = 1000
------- ------ -------- ---------- ---------- ---------- ----------=20

total 2001 37.15 36.27 0 132000 0 = 1000

Misses in library cache during parse: 1
Optimizer goal: CHOOSE
Parsing user id: SYS (recursive depth: 1)

Rows Row Source Operation

-------  ---------------------------------------------------

   1000 SORT AGGREGATE (cr=3D132000 r=3D0 w=3D0 time=3D36185613 us) 10001000 TABLE ACCESS BY INDEX ROWID TESTLIO (cr=3D132000 r=3D0 w=3D0=20 time=3D28015044 us)
10001000 INDEX RANGE SCAN TESTLIO_I1 (cr=3D25000 r=3D0 w=3D0 = time=3D9976625=20
us)(object id 6318)



9205

SELECT COUNT(V)
FROM
 TESTLIO WHERE N BETWEEN 10000 AND 20000 call count cpu elapsed disk query current = rows
------- ------ -------- ---------- ---------- ---------- ----------=20

Parse 1 0.00 0.00 0 0 0 = 0
Execute 1000 0.05 0.07 0 0 0 = 0
Fetch 1000 6.89 6.72 0 132000 0 = 1000
------- ------ -------- ---------- ---------- ---------- ----------=20

total 2001 6.94 6.81 0 132000 0 = 1000

Misses in library cache during parse: 1
Optimizer goal: CHOOSE
Parsing user id: SYS (recursive depth: 1)

Rows Row Source Operation

-------  ---------------------------------------------------

   1000 SORT AGGREGATE
10001000 TABLE ACCESS BY INDEX ROWID TESTLIO 10001000 INDEX RANGE SCAN TESTLIO_I1 (object id 6289)


RAW portion of TRC file



9204

PARSING IN CURSOR #5 len=3D60 dep=3D1 uid=3D0 oct=3D3 lid=3D0 = tim=3D1065854307286108=20
hv=3D518780277 ad=3D'5aca2538'
SELECT count(v) from testlio where n between 10000 and 20000 END OF STMT
PARSE =
#5:c=3D0,e=3D485,p=3D0,cr=3D0,cu=3D0,mis=3D1,r=3D0,dep=3D1,og=3D4,tim=3D1= 065854307286097
BINDS #5:
EXEC =
#5:c=3D0,e=3D134,p=3D0,cr=3D0,cu=3D0,mis=3D0,r=3D0,dep=3D1,og=3D4,tim=3D1= 065854307286405
FETCH=20
#5:c=3D40000,e=3D36240,p=3D0,cr=3D132,cu=3D0,mis=3D0,r=3D1,dep=3D1,og=3D4= ,tim=3D1065854307322684
BINDS #5:
EXEC =
#5:c=3D0,e=3D85,p=3D0,cr=3D0,cu=3D0,mis=3D0,r=3D0,dep=3D1,og=3D4,tim=3D10= 65854307322899
FETCH=20
#5:c=3D40000,e=3D36128,p=3D0,cr=3D132,cu=3D0,mis=3D0,r=3D1,dep=3D1,og=3D4= ,tim=3D1065854307359065
BINDS #5:
EXEC =
#5:c=3D0,e=3D81,p=3D0,cr=3D0,cu=3D0,mis=3D0,r=3D0,dep=3D1,og=3D4,tim=3D10= 65854307359268
FETCH=20
#5:c=3D30000,e=3D36181,p=3D0,cr=3D132,cu=3D0,mis=3D0,r=3D1,dep=3D1,og=3D4= ,tim=3D1065854307395487
BINDS #5:
EXEC =
#5:c=3D0,e=3D81,p=3D0,cr=3D0,cu=3D0,mis=3D0,r=3D0,dep=3D1,og=3D4,tim=3D10= 65854307395689
FETCH=20
#5:c=3D40000,e=3D36145,p=3D0,cr=3D132,cu=3D0,mis=3D0,r=3D1,dep=3D1,og=3D4= ,tim=3D1065854307431871
BINDS #5:

9204

PARSING IN CURSOR #5 len=3D60 dep=3D1 uid=3D0 oct=3D3 lid=3D0 = tim=3D1065854501680779=20
hv=3D4259315813 ad=3D'5bc9bfdc'
SELECT COUNT(V) FROM TESTLIO WHERE N BETWEEN 10000 AND 20000 END OF STMT
PARSE=20
#5:c=3D0,e=3D7476,p=3D0,cr=3D0,cu=3D0,mis=3D1,r=3D0,dep=3D1,og=3D4,tim=3D= 1065854501680769
BINDS #5:
EXEC =
#5:c=3D0,e=3D134,p=3D0,cr=3D0,cu=3D0,mis=3D0,r=3D0,dep=3D1,og=3D4,tim=3D1= 065854501681077
FETCH=20
#5:c=3D10000,e=3D6736,p=3D0,cr=3D132,cu=3D0,mis=3D0,r=3D1,dep=3D1,og=3D4,= tim=3D1065854501687852
BINDS #5:
EXEC =
#5:c=3D0,e=3D82,p=3D0,cr=3D0,cu=3D0,mis=3D0,r=3D0,dep=3D1,og=3D4,tim=3D10= 65854501688065
FETCH=20
#5:c=3D0,e=3D6707,p=3D0,cr=3D132,cu=3D0,mis=3D0,r=3D1,dep=3D1,og=3D4,tim=3D= 1065854501694810
BINDS #5:
EXEC =
#5:c=3D0,e=3D81,p=3D0,cr=3D0,cu=3D0,mis=3D0,r=3D0,dep=3D1,og=3D4,tim=3D10= 65854501695011
FETCH=20
#5:c=3D10000,e=3D6699,p=3D0,cr=3D132,cu=3D0,mis=3D0,r=3D1,dep=3D1,og=3D4,= tim=3D1065854501701747
BINDS #5:
EXEC =
#5:c=3D0,e=3D79,p=3D0,cr=3D0,cu=3D0,mis=3D0,r=3D0,dep=3D1,og=3D4,tim=3D10= 65854501701944
FETCH=20
#5:c=3D10000,e=3D6747,p=3D0,cr=3D132,cu=3D0,mis=3D0,r=3D1,dep=3D1,og=3D4,= tim=3D1065854501708729
BINDS #5:
EXEC =
#5:c=3D0,e=3D80,p=3D0,cr=3D0,cu=3D0,mis=3D0,r=3D0,dep=3D1,og=3D4,tim=3D10= 65854501708927
FETCH=20
#5:c=3D10000,e=3D6650,p=3D0,cr=3D132,cu=3D0,mis=3D0,r=3D1,dep=3D1,og=3D4,= tim=3D1065854501715614
BINDS #5:
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D

-- mk loop
drop table testlio ;
create table testlio (n number, v varchar2(1000)) tablespace users; begin for f in 1..30000 loop
insert into testlio values=20
(f,'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa');=

end loop;
end;
/
create index testlio_i1 on testlio (n) tablespace users;

Jurijs
9268222
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D http://otn.oracle.com/ocm/jvelikanovs.html



Please see the official ORACLE-L FAQ: http://www.orafaq.com

To unsubscribe send email to: oracle-l-request_at_freelists.org put 'unsubscribe' in the subject line.
--
Archives are at http://www.freelists.org/archives/oracle-l/
FAQ is at http://www.freelists.org/help/fom-serve/cache/1.html
-----------------------------------------------------------------

----------------------------------------------------------------
Please see the official ORACLE-L FAQ: http://www.orafaq.com
----------------------------------------------------------------
To unsubscribe send email to:  oracle-l-request_at_freelists.org
put 'unsubscribe' in the subject line.
--
Archives are at http://www.freelists.org/archives/oracle-l/
FAQ is at http://www.freelists.org/help/fom-serve/cache/1.html
-----------------------------------------------------------------


----------------------------------------------------------------
Please see the official ORACLE-L FAQ: http://www.orafaq.com
----------------------------------------------------------------
To unsubscribe send email to:  oracle-l-request_at_freelists.org
put 'unsubscribe' in the subject line.
--
Archives are at http://www.freelists.org/archives/oracle-l/
FAQ is at http://www.freelists.org/help/fom-serve/cache/1.html
-----------------------------------------------------------------
Received on Mon Aug 02 2004 - 10:50:18 CDT

Original text of this message

HOME | ASK QUESTION | ADD INFO | SEARCH | E-MAIL US