Interactive Reports - Performance Issue

Hi All
We have been getting ORA-04030: out of process memory … more and more frequently since first implementing Interactive Reports. From Enterprise Manager we had a look at the most costly queries and the one that stands out the most is:
SELECT *
FROM WWV_FLOW_WORKSHEET_CONDITIONS
WHERE CONDITION_TYPE = ‘HIGHLIGHT’
AND WORKSHEET_ID = :B2
AND SECURITY_GROUP_ID = :B1
ORDER BY HIGHLIGHT_SEQUENCE, NAME I have done all I can with the memory configuration and we are in the process of upgrading the servers to 64 bit Linux.
However, I noticed that WWV_FLOW_WORKSHEET_CONDITIONS table has 400,000 rows and the above query is performing a full table scan on it. As the query is run each time an IR report is viewed, this could account for the problems. The DBAs are of the opinion that the indexing and query are optimal and cannot be improved, so the obvious solution is to archive and purge the table.
Of the 400k rows, 80% are session values linked to sessions that no longer exists. It would appear that each time a user adds a filter or highlight to an interactive report it is recorded as a session value in the WWV_FLOW_WORKSHEET_CONDITIONS table. When the user logs out and closes the session, the values remain in the table and aren't cleared!!!? We currently average about 90 users a day with 60,000+ page requests so 400,000 rows is way more than I would expect to see.
Am I missing something? How do redundant session values get purged from the ir flows tables? Is there a (supported) way for me to clear them?
This is a critical issue for me now and I have raised an SR on metalink, but if the forum could offer some advice or assistance it would be very much appreciated.
Cheers
Simon
Bumped by: Shunt on May 12, 2009 11:00 AM

Hi Varad
Thanks for your help. I have had a good play with the purge function and now I'm more confused than ever. First let me explain my test scenario: I have an application with an interactive report in which I am logged in and able to make session changes (without saving the reports). I am observing the session activity on the Interactive Report using the apex_application_page_ir_rpt view which is set to filter on the application and page number for the Interactive Report I am testing.
Test 1
User logs into application, adds a filter to the report.
Result: A new row appears in the apex_application_page_ir_rpt view
Administrator Purges all sessions > 10secs old
Result: The new row is removed from apex_application_page_ir_rpt view
Test 2
User logs into application, adds a filter to the report.
Result: A new row appears in the apex_application_page_ir_rpt view
User logs out of application
Result: The new row remains in the apex_application_page_ir_rpt view
Administrator Purges all sessions > 10 secs old
Result: The new row still remains in the apex_application_page_ir_rpt view view
I hope that makes sense. Why would the session values not be cleared if the user logs out first? Why are they not then cleared if all the sessions are purged?
I am hoping that someone else can repeat the test and see if they find the same result.
Cheers
Simon

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Edited by: user9363364 on Aug 24, 2010 7:49 AM
Edited by: user9363364 on Sep 1, 2010 7:59 AM

Hi
i also faced such an issue and then i found the answer on metalink
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Applies to:
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Information in this document applies to any platform.
Symptoms
Obtaining the following error when trying to process a BQY that uses an Essbase data source in Workspace:
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Cause
The name of the data source in the CMC contained the machine name in fully qualified name format whereas the OCE contained the machine name only. This mismatch in machine names caused the problem. Making the machine name identical in both cases resolved the problem.
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Hello all;
This is regarding a thread Interactive report performance problem over database link that was posted by Samo.
The issue that I am facing is when I use Oracle function like (apex_item.check_box) the query slow down by 45 seconds.
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http://www.munkyben.wordpress.com
Don't forget to mark replies helpful or correct ;)

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http://www.munkyben.wordpress.com
Don't forget to mark replies helpful or correct ;)
Edited by: Munky on Sep 29, 2009 1:41 PM

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Gus C wrote:
One thing I would try.
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Gus

Hi Gus,
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