How to manage number of OLAP Discoverer Plus reports

We are currently running Discoverer Plus OLAP and experiencing very slow performance.
OracleBI Discoverer version 10.1.2.55.26
D4O Build 10.1.2.55.26
BI Beans Build 3.2.3.1.36
JDK Version 1.6.0_23
Oracle RDBMS version 10.2.0.5
The D4OSYS.BISM_OBJECTS table in production contains almost 300,000 rows equating to over 25,000 reports.
During testing in our performance environment we found that reducing the number of reports significantly improved performance. For example, when we click on the drop down menu in the available items panel with 25K reports, it takes 12 seconds. When we reduce the number of reports to 8K it takes 4 seconds. When we reduce the number of reports to the bare minimum for our application (approx 200) response is almost instantaeous.
Is there a best practice for the number of reports for this type of environment?
Is there a way to enforce a maximum number of reports?
Thanks,
Joanne

Hi Joanne
25,000 reports is high. I've seen a few places with more but not by many so you are right up there at the top of a small list. I'd hazard a guess to say that some of them must be redundant.
The first thing I would advise would be to get your DBA to reorg the table. This way it will have the optimum settings and the indexes will not be lop sided. Also, please make sure your DBA is gathering statistics for this table otherwise if it has been a long time the optimizer will have trouble figuring out how to get data out of it.
With regards to redundant reports that will be a little more difficult to resolve. You probably need to go through a clean up exercise and ask your users to get rid of unwanted reports. You should also check to see if any reports are owned by ex-employees. These can probably go. However, I would advise taking a backup first - just in case!
Best wishes
Michael

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