Query run time increases with subsequent runs.

Hello All
I am looking for some hint about if someone else has faced such an issue in OBIEE
We are trying to enhance performance of some OBIEE Analysis reports. Every time we do a change and deploy out changes the report runs very quick like in 40 seconds . Even when I run the physical query in the database it runs quick as well. After few minutes we run the report again it take 10 minutes and then after some time we run it again it takes 20 minutes. It stabilized around 30 minutes.
We thought it needs more tuning. We tried some more, removed outer joins from the RPD, tuned those joins where we are fectching large amounts of data and deployed it again. Again the first time we ran the report it returned results in less than 30 seconds. Ran it again and it took 6 minutes. And again around 9 mins.
Once again the physical SQL is quick too in the database.
The first time we run the report we are happy to see the run time but subsequent runs take so long.
This is a test envt. so there are not huge load on the database. Also currently we dont have any caching enabled but we may do that as well.
I am just curious to see if anyone has faced something like this. I am running out of options on further tuning the views and joins that we are using. I am not able to think, why the first time we check our reports they run fast and this behavior is so reproducible now. And every time we start with our changes we delete all presentation layer cache etc.
Thanks

query caching is primarily a run-time performance improvement capability.and over a period of time, performance tends to improve due to cache hits for more refer this Managing Performance Tuning and Query Caching - 11g Release 1 (11.1.1)

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Hi all,
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Thanks a lot for your help!
Solved!
Go to Solution.
Attachments:
TimeTesting.zip ‏70 KB
Graph.PNG ‏20 KB

jul7290 wrote:
Thank you very much for your help! I added the "Clear task" vi and now it works properly.
If you are still using the RUn Continuously you should stop. That is meant strictly for debugging. In fact, I can't even tell you the last time I ever used it. If you want your code to repeat you should use loops and control the behavior of the code.
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"Does anyone know where the love of God goes when the waves turn the minutes to hours?"
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Hi All,
There was a run time error due to the 'EXTRACT' statement in the code in the standard program 'RAKOPL02'.
EXTRACT daten.
Can you please let me know the possible causes and necessary corrections to the system (at basis level) if any?
Thanks in advance,
RAVI
Edited by: Maruvada Ravi Kishore on Jun 4, 2009 6:01 AM
Edited by: Maruvada Ravi Kishore on Jun 4, 2009 6:01 AM

Hello,
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Solved!
Go to Solution.

Im not for sure I am on the same page with you here. Im not trying to develop any code myself. I have some labview executables that came with hardware we purchased in order to control it. We used to have labview 6.1 installed; so everything was working ok. But now that I have installed 2011, I get an error message when trying to run these executables. The error message states that this executable requires a labview 6.1 or compatible run-time engine. I have seen this error on both XP and Windows 7 machines. I did not develop the executable, it was developed by the hardware manufacturer. But since this hardware is only about 1 year old, I an assuming they used a newer version of Labview to develop this code. Certianly newer than 6.1.
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Hi,
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http://stackoverflow.com/questions/12816641/failed-to-convert-parameter-value-from-string-to-guid
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I want to collect performance data from weblogic running as a service. I
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Query run time increases with subsequent runs.

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