Query Execution time differs when executed inside a procedure

Hi All,
Oracle 10.2.0
Windows 2003 server
We have a query that runs faster when it is executed as a seperate query.
But its taking time when it is executed as a procedure.
Please advice to find the problem.
TIA,

ORCLDB wrote:
Hi All,
Oracle 10.2.0
Windows 2003 server
We have a query that runs faster when it is executed as a seperate query.
But its taking time when it is executed as a procedure.
Please advice to find the problem.
TIA,You should be able to enable a 10046 trace at level 12 for each execution environment, and examine the STAT lines in the raw trace files to see how the execution plans differ, and if bind variables are used, to see if those bind variables are defined as an incorrect data type. Search the forums to see how to enable a 10046 trace and read the resulting trace files.
Here is a post which shows how to read the trace files. I probably posted a couple times in the past how to enable a 10046 trace:
Re: some 10046 traceing questions.....
Are you running 10.2.0.1, 10.2.0.2, 10.2.0.3, or 10.2.0.4?
Charles Hooper
IT Manager/Oracle DBA
K&M Machine-Fabricating, Inc.

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SEM_MATCH query execution time when a predicate is set as a variable

Hello there,
Our ontology contains 70 million triples (12.5 million asserted triples and 58 million inferred triples). We created a virtual model which includes both asserted and inferred triples).
Our semantic network index configuration is 'PSCM' (index status is valid).
The problem we encounter is when we run a SEM_MATCH query which includes a predicate as a variable, the query ran for 22 seconds. When a similar query is run when the variable is subject or an object or both the time for the SEM_MATCH query execution is 0.2 seconds. Is this reasonable? What do we do wrong?
For example:
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SELECT a FROM TABLE ( SEM_MATCH
( ' { <http://www.tomproj.com/rep#entity_4> ?a 4 }',
SEM_MODELS( 'TOM_VIRTUAL_MODEL') ,
NULL,
NULL,
NULL,
'ALLOW_DUP=T'));
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SELECT a FROM TABLE ( SEM_MATCH
( ' { ?a <http://www.tomproj.com/rep#id> 4 }',
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NULL,
NULL,
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NULL,
NULL,
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Cheers,
Doron

Hi,
So far no lack, None of the solutions are working.
Query execution time didn't change after executing the following:
1. SEM_APIS.DROP_SEM_INDEX('SCP');
2. SEM_APIS.ADD_SEM_INDEX('SCPM');
3. SEM_APIS.ALTER_SEM_INDEX_ON_MODEL('TOM','SCPM','REBUILD');
4. SEM_APIS.ALTER_SEM_INDEX_ON_MODEL('TOM_TF','SCPM','REBUILD');
5. SEM_APIS.ALTER_SEM_INDEX_ON_RULES_INDEX('TOM_RI','SCPM','REBUILD');
My original query (see below) execution time remains 22 secs.
SELECT a FROM TABLE ( SEM_MATCH
( ' { <http://www.tomproj.com/rep#entity_4> ?a 4 }',
SEM_MODELS( 'TOM_VIRTUAL_MODEL') ,
NULL,
NULL,
NULL,
'ALLOW_DUP=T'));
When running the SEM_MATCH on each model ('TOM,'TOM_TF') separately execution time was very fast (~0.007 secs):
1. SELECT a FROM TABLE ( SEM_MATCH
( ' { <http://www.tomproj.com/rep#entity_4> ?a 4 }',
SEM_MODELS( 'TOM') ,
NULL,
NULL,
NULL,
NULL));
2. . SELECT a FROM TABLE ( SEM_MATCH
( ' { <http://www.tomproj.com/rep#entity_4> ?a 4 }',
SEM_MODELS( 'TOM_TF') ,
NULL,
NULL,
NULL,
NULL));
When running the query on both models, execution time was 54 secs:
SELECT a FROM TABLE ( SEM_MATCH
( ' { <http://www.tomproj.com/rep#entity_4> ?a 4 }',
SEM_MODELS( 'TOM','TOM_TF') ,
NULL,
NULL,
NULL,
NULL));
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As for using parallel parameter in SEM_APIS.ALTER_SEM_INDEX…, since we are using Oracle 11g release 1 the SEM_APIS.ALTER_SEM_INDEX doesn’t support the parallel parameter as far as we know.
In Oracle 11g release 2 the SEM_APIS.ALTER_SEM_INDEX was extended to support the use of 'parallel' parameter.
Any ideas on what do we do wrong?
Cheers,
Doron

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/>

Query execution time

Dear SCN,
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Table defination in datatype size can effect on query execution time.

Hello Oracle Guru,
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SY.

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I say set time on ;
set autotrace on ;
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2    1     MERGE JOIN (CARTESIAN) (Cost=20 Card=1 Bytes=1003)
3    2       NESTED LOOPS
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13   12                       INDEX (UNIQUE SCAN) OF 'USR_DIM_PK' (I
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How can I reduce BEx Query execution time

Hi,
I have a question regarding query execution time in BEx.
I have a query that takes 45 mins to 1 hour to execute in BEx analyser. This query is run on a daily basis and hence I am keen to reduce the execution time. Are there any programs or function modules that can help in reducing query execution time?
Thanks and Regards!

Hi Sriprakash,
1.Check if your cube is performance tuned: in the manage cube from RSA1 / performance tab: check if all indexes and statistics are green. Aggregate IDx should as well be.
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Query runtime vs Query execution time

Hi,
I am trying to find the most executed queries (how often queries are executed) in our BI system.
I got query runtime from Hitlist in st03 Reporting analysis.
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thanks

hi,
I hope you already installed the statistics.
You can get lot of details like which quereis are being used and their history and how many times they executed and by whom , when and also tells DB, OLPA, and Frontend times in ST03N in Expert mode
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Re: BEx Query is executed how many times???
also refer help - navigate to BW Statistics MultiProvider Queries
http://help.sap.com/saphelp_nw04s/helpdata/en/44/10cb9a8f345cf9e10000000a155369/frameset.htm
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Thanks
Edited by: Srinivas on Oct 30, 2008 9:42 PM

Oracle View that stores the Query execution time

Hi Gurus
i m using Oracle 10G in Unix. I wudiold like to know which Data dictionary view stores the execution of a query. If it is not stored then hw to find the query execution time other than (Set timing on) command. What is the use of elapsed time and what is the difference between execution time and elapsed time? How to calculate the execution time of a query.
THanks
Ram

If you have a specific query you're going to run in SQL*Plus, just do
a 'set timing on' before you execute the query.
If you've got application SQL coming in from all over the place, you can
identify specific SQL in V$SQL/ and look at ELAPSED_TIME/EXECUTIONS
to get an average elapsed time.
If you've got an application running SQL, and you need to know the
specific timing of a specific execution (as opposed to an average),
you can use DBMS_SUPPORT to set trace in the session that your
application is running in, and then use TkProf to process the resulting
trace file.

Identifying query execution time

Hello,
I would like to know how can I figure out the actual query execution time in Oracle.
Regards

Oracle Documentation is your best friend.
http://download.oracle.com/docs/cd/B19306_01/server.102/b14237/dynviews_2113.htm#i1417057
ELAPSED_TIME --> Elapsed time (in microseconds) used by this cursor for parsing, executing, and fetching
Asif Momen
http://momendba.blogspot.com

Clustering of SQL query execution times

In doing some query execution experiments I have noted a curious (to me, anyhow) clustering of execution times around two distinct points. Across about 100 tests each running 1000 queries using (pseudo-)randomly generated IDs the following pattern emerges. The queries were run from Java using all combinations of pooled/non-pooled and thin/oci driver combinations:
     100          *
     90          *
R     80          *
u     70          *
n     60          *
s     50          *
     40          *                                             *
     30          *                                             *
     20          *                                        *     *     *
     10          *     *                              *     *     *     *
          0     100     200     300     400     500     600     700     800     900     1000     1100     1200
                                   Time(ms)Where about half of the total execution times cluster strongly about a given (short) time value with a smaller but broader clustering at a significantly slower mark, with zero intermediate values. The last point is the one I find most curious.
What I would have expected is something like this:
     100
     90
R     80
u     70
n     60
s     50
     40                              *
     30                         *     *     *
     20                    *     *     *     *     *     *
     10          *     *     *     *     *     *     *     *     *     *
          0     100     200     300     400     500     600     700     800     900     1000     1100     1200
                                   Time(ms)The variables I have tentatively discounted thus far:
-query differences (single query used)
-connection differences (using single pooled connection)
-garbage collection (collection spikes independent of query execution times)
-amount of data returned in bytes (single varchar2 returned and size is independent of execution time)
-driver differences (thin and oci compared, overall times differ but pattern of clustering remains)
-differences between Statement and PreparedStatement usage (both show same pattern)
I know this is a rather open-ended question, but does the described pattern seem faniliar or spark any thoughts?
DB-side file I/O?
Thread time-slicing variations (client or DB-side)?
FWIW, the DB is 9.2.0.3 DB and the clients are running on WinXP with Java 5.0 and 9i drivers.
Thanks and regards,
M

Further context:
Are your queries only SELECT queries ?
Yes, the same SELECT query is used for all tests. The only variable is the bind variable used to identify the primary key of the selection set (i.e. SELECT a.* from a, b, c where a.x = b.x and b.y = c.y and c.pk = ?) where all PKs and FKs are indexed.Do the queries always use the same tables, the same where clauses ?
Yes, the same tables are always invoked. The where clauses invoked are identical with the excepton of the single bind variable as described above.Do your queries always use bind variables ?
A single bind variable is used in all invocations as described above.Are your queries also running in single user mode or multi user mode (do you use SELECT FOR UPDATE ?) ?
We are not using SELECT FOR UPDATEDid something else run on the database/on the server hosting the database on the same time ?
I have not eliminated the idea, but the test has been repeated roughly 100 times over the course of a week and at different times of day with the same pattern emerging. I suppose it is not out of the question that a resource-hogging process is running consistently and constantly on the DB-side box.Thanks for the input,
M

How to get query execution time without running...?

Hi ,
I had one requirement .... as follows ......
i had 3 sql statements . I need to execute only one sql which execution time is very less.
Can any one help me , how to get query execution time without running that query and without using explain plan..?
Thanks,
Rajesh

Kim Berg Hansen wrote:
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SY.
Edited by: Solomon Yakobson on Apr 3, 2012 8:44 AM

How Can I reduce Query Execution time with use of filter

Dear Experts,
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Hi All,
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Thanks in advance,
Santosh.

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Oracle related stuff:
http://oracle-randolf.blogspot.com/
SQLTools++ for Oracle:
http://www.sqltools-plusplus.org:7676/
http://sourceforge.net/projects/sqlt-pp/

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Hi All!
Could you please let me know the function name used in finding 'Query Execution Time'?
Thanks and Regards,
Vikas

I'm not quite sure what you mean...
In SQL*Plus: SET TIMING ON
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cheers,
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Query Execution time differs when executed inside a procedure

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