Comments on: Oracle Open World 2008, Day 4 : OBIEE Action Framework, and OBIEE Performance Tuning http://www.rittmanmead.com/2008/09/26/oracle-open-world-day-4-obiee-action-framework-and-obiee-performance-tuning/ Delivered Intelligence Fri, 30 Jul 2010 17:54:00 -0400 http://wordpress.org/?v=2.8.4 hourly 1 By: Mark Rittman http://www.rittmanmead.com/2008/09/26/oracle-open-world-day-4-obiee-action-framework-and-obiee-performance-tuning/comment-page-1/#comment-12382 Mark Rittman Sat, 03 Apr 2010 12:12:03 +0000 http://www.rittmanmead.com/2008/09/26/oracle-open-world-day-4-obiee-action-framework-and-obiee-performance-tuning/#comment-12382 Hi Rohit Take a look at this blog post: http://www.rittmanmead.com/2010/03/03/inside-the-oracle-bi-server-part-3-bi-server-in-memory-joins/ for some more details on stitch joins and other types of BI Server join types, regards Mark Hi Rohit

Take a look at this blog post:

http://www.rittmanmead.com/2010/03/03/inside-the-oracle-bi-server-part-3-bi-server-in-memory-joins/

for some more details on stitch joins and other types of BI Server join types,

regards

Mark

]]> By: Rohit http://www.rittmanmead.com/2008/09/26/oracle-open-world-day-4-obiee-action-framework-and-obiee-performance-tuning/comment-page-1/#comment-12381 Rohit Sat, 03 Apr 2010 11:51:24 +0000 http://www.rittmanmead.com/2008/09/26/oracle-open-world-day-4-obiee-action-framework-and-obiee-performance-tuning/#comment-12381 Hi Mark, I was searching about the stitch queries and came across your findings on the same. This is an interesting post. Can u throw some more light on OBIEE Query formation and stitch query generation. In what scenarios OBIEE generates full outer joins between the queries. Hi Mark,

I was searching about the stitch queries and came across your findings on the same.
This is an interesting post. Can u throw some more light on OBIEE Query formation and stitch query generation.
In what scenarios OBIEE generates full outer joins between the queries.

]]> By: Mani http://www.rittmanmead.com/2008/09/26/oracle-open-world-day-4-obiee-action-framework-and-obiee-performance-tuning/comment-page-1/#comment-8951 Mani Sat, 21 Mar 2009 14:50:39 +0000 http://www.rittmanmead.com/2008/09/26/oracle-open-world-day-4-obiee-action-framework-and-obiee-performance-tuning/#comment-8951 Can someone throw light on the following?: * Using external drives for OBIEE caching directories * Improving prime web caching for static jss and css files and finally the importance of proper sizing. * How do the FILTER USING metrics affect the OBIEE performance (such as fact using a dimension type)? Can someone throw light on the following?:

* Using external drives for OBIEE caching directories
* Improving prime web caching for static jss and css files and finally the importance of proper sizing.

* How do the FILTER USING metrics affect the OBIEE performance (such as fact using a dimension type)?

]]> By: Mani http://www.rittmanmead.com/2008/09/26/oracle-open-world-day-4-obiee-action-framework-and-obiee-performance-tuning/comment-page-1/#comment-8950 Mani Sat, 21 Mar 2009 14:43:43 +0000 http://www.rittmanmead.com/2008/09/26/oracle-open-world-day-4-obiee-action-framework-and-obiee-performance-tuning/#comment-8950 How do we cache a given segment? For example: First time, we run a given segment it take 3 hours, the next run it takes less than 10 mins. So, if the user/IT can cache the segment before the user tries to run, he will get a fast response. How do achieve this? Please let me know. How do we cache a given segment?

For example:

First time, we run a given segment it take 3 hours, the next run it takes less than 10 mins. So, if the user/IT can cache the segment before the user tries to run, he will get a fast response.

How do achieve this? Please let me know.

]]> By: hinata4me http://www.rittmanmead.com/2008/09/26/oracle-open-world-day-4-obiee-action-framework-and-obiee-performance-tuning/comment-page-1/#comment-6512 hinata4me Tue, 14 Oct 2008 15:32:50 +0000 http://www.rittmanmead.com/2008/09/26/oracle-open-world-day-4-obiee-action-framework-and-obiee-performance-tuning/#comment-6512 Thank you for such good and complete informations... I wish I could find some talk about using OBIEE variables (System/Session and Static/Dynamic) when using outer joins (sub queries) with some restriction on one part of the query used in joins... I keep waiting since OBIEE is freshly new in France (where I work). Sorry for my poor english writting... :) Thank you for such good and complete informations…
I wish I could find some talk about using OBIEE variables (System/Session and Static/Dynamic) when using outer joins (sub queries) with some restriction on one part of the query used in joins… I keep waiting since OBIEE is freshly new in France (where I work).
Sorry for my poor english writting… :)

]]> By: Peter Scott http://www.rittmanmead.com/2008/09/26/oracle-open-world-day-4-obiee-action-framework-and-obiee-performance-tuning/comment-page-1/#comment-6472 Peter Scott Wed, 01 Oct 2008 18:22:33 +0000 http://www.rittmanmead.com/2008/09/26/oracle-open-world-day-4-obiee-action-framework-and-obiee-performance-tuning/#comment-6472 @Bud, Mark, Stuart Perhaps the confusion is with Cube Organized Materialized views in 11g OLAP - for query rewrite to occur to the OLAP cube we must be able to represent the measure as part of a SQL select statement in the Materialized View definition and for a lot of complex measures there is not (yet??) a way to represent the calculation in SQL. But for accessing a cube as fixed piece of SQL against a named cube view then, as Bud says, the measure is just another column and can be queried @Bud, Mark, Stuart
Perhaps the confusion is with Cube Organized Materialized views in 11g OLAP – for query rewrite to occur to the OLAP cube we must be able to represent the measure as part of a SQL select statement in the Materialized View definition and for a lot of complex measures there is not (yet??) a way to represent the calculation in SQL.
But for accessing a cube as fixed piece of SQL against a named cube view then, as Bud says, the measure is just another column and can be queried

]]> By: Bud Endress http://www.rittmanmead.com/2008/09/26/oracle-open-world-day-4-obiee-action-framework-and-obiee-performance-tuning/comment-page-1/#comment-6471 Bud Endress Wed, 01 Oct 2008 15:18:39 +0000 http://www.rittmanmead.com/2008/09/26/oracle-open-world-day-4-obiee-action-framework-and-obiee-performance-tuning/#comment-6471 I'm not quite sure why it would be thought that 'Essbase would be an easier fit' than Oracle OLAP when measures are required that aren't in the underlying star schema. It is very easy to add sophisticated measures to an Oracle OLAP Cube. These measures then simply appear as new columns in the fact view of the cube. Since Oracle presents OLAP cube data as views in the form of a star schema, the new measure is simply installed into that star schema. OBIEE (or any other application) simply selects from that column using SQL. That's pushing the calculation as far down the stack as possible. So, with Oracle OLAP you can push aggregations, calculations and joins directly into the database cube and access aggregates and calculations with simple SQL. And, since the cube is simply another SQL accessible data type within the database it can be joined with other data types in the database rather than the middle tier. I’m not quite sure why it would be thought that ‘Essbase would be an easier fit’ than Oracle OLAP when measures are required that aren’t in the underlying star schema. It is very easy to add sophisticated measures to an Oracle OLAP Cube. These measures then simply appear as new columns in the fact view of the cube. Since Oracle presents OLAP cube data as views in the form of a star schema, the new measure is simply installed into that star schema. OBIEE (or any other application) simply selects from that column using SQL. That’s pushing the calculation as far down the stack as possible. So, with Oracle OLAP you can push aggregations, calculations and joins directly into the database cube and access aggregates and calculations with simple SQL. And, since the cube is simply another SQL accessible data type within the database it can be joined with other data types in the database rather than the middle tier.

]]> By: Mark Rittman http://www.rittmanmead.com/2008/09/26/oracle-open-world-day-4-obiee-action-framework-and-obiee-performance-tuning/comment-page-1/#comment-6463 Mark Rittman Mon, 29 Sep 2008 22:20:35 +0000 http://www.rittmanmead.com/2008/09/26/oracle-open-world-day-4-obiee-action-framework-and-obiee-performance-tuning/#comment-6463 Hi Stuart, It was actually the presenter's suggestion actually, although he may have mentioned Oracle OLAP as well, I'm not sure. I think from the perspective of Oracle OLAP, at present if you want to use calculated measures in your OLAP cube, Essbase is an easier fit as you'd need to go through the OLAP views route if you wanted to use Oracle OLAP - for straight simple aggregations both are as easy, but when you require measures that aren't in the underlying star schema, Essbase is an easier fit. As you probably know, full support for Oracle OLAP including calculated measures is due in the next OBIEE release, so I think at that point it'll be a more obvious alternative to Essbase. regards, Mark Hi Stuart,

It was actually the presenter’s suggestion actually, although he may have mentioned Oracle OLAP as well, I’m not sure. I think from the perspective of Oracle OLAP, at present if you want to use calculated measures in your OLAP cube, Essbase is an easier fit as you’d need to go through the OLAP views route if you wanted to use Oracle OLAP – for straight simple aggregations both are as easy, but when you require measures that aren’t in the underlying star schema, Essbase is an easier fit.

As you probably know, full support for Oracle OLAP including calculated measures is due in the next OBIEE release, so I think at that point it’ll be a more obvious alternative to Essbase.

regards, Mark

]]> By: Andriy Yakushyn http://www.rittmanmead.com/2008/09/26/oracle-open-world-day-4-obiee-action-framework-and-obiee-performance-tuning/comment-page-1/#comment-6461 Andriy Yakushyn Mon, 29 Sep 2008 16:10:32 +0000 http://www.rittmanmead.com/2008/09/26/oracle-open-world-day-4-obiee-action-framework-and-obiee-performance-tuning/#comment-6461 Mark, This is an excellent summary of the OOW session. I wonder if they touched external factors (such as using external drives for OBIEE caching directories, improving prime web caching for static jss and css files, and finally the importance of proper sizing). Also, from your experience, how do the FILTER USING metrics affect the OBIEE performance (such as fact using a dimension type). Thank you Andriy Yakushyn Mark,

This is an excellent summary of the OOW session. I wonder if they touched external factors (such as using external drives for OBIEE caching directories, improving prime web caching for static jss and css files, and finally the importance of proper sizing).

Also, from your experience, how do the FILTER USING metrics affect the OBIEE performance (such as fact using a dimension type).

Thank you
Andriy Yakushyn

]]> By: Stuart Bunby http://www.rittmanmead.com/2008/09/26/oracle-open-world-day-4-obiee-action-framework-and-obiee-performance-tuning/comment-page-1/#comment-6457 Stuart Bunby Mon, 29 Sep 2008 11:19:57 +0000 http://www.rittmanmead.com/2008/09/26/oracle-open-world-day-4-obiee-action-framework-and-obiee-performance-tuning/#comment-6457 Hi Mark, I'm interested in your suggestion that Essbase should be considered if lots of aggregates or complex calculations are needed - isn't this exactly what Oracle OLAP is positioned for? Stuart Bunby Hi Mark,

I’m interested in your suggestion that Essbase should be considered if lots of aggregates or complex calculations are needed – isn’t this exactly what Oracle OLAP is positioned for?

Stuart Bunby

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