Comments on: Compressed Composites (Oracle 10g Compression) Explained http://www.rittmanmead.com/2005/01/05/compressed-composites-oracle-10g-compression-explained-2/ Delivered Intelligence Fri, 30 Jul 2010 17:54:00 -0400 http://wordpress.org/?v=2.8.4 hourly 1 By: Imran Shah http://www.rittmanmead.com/2005/01/05/compressed-composites-oracle-10g-compression-explained-2/comment-page-1/#comment-238 Imran Shah Wed, 07 Mar 2007 23:21:30 +0000 http://www.rittmanmead.com/wp2/2005/01/05/compressed-composites-oracle-10g-compression-explained-2/#comment-238 Mark, I have been trying to evaluate compressed composites in 10gR1 & now in R2. Using the sample schema, from your performance tips atricle (part 1) I have tried to get the same results without luck. I had to generate some extra data for the fact table (about 400k rows), but I find the GSW AW using the compressed template takes twice as long as the regular sparse template. I was testing on a windows 2GB RAM,2 cpu machine, on 10.2.0.3. The only time I have seen any improvement (only slight) was by taking channel out of the CC. I seen many forum posts regarding CC's but as yet have not seen the results myself. What could I be doing wrong.? I thought by using your example it should ensure I can see similar results. Regards, Imran Mark,
I have been trying to evaluate compressed composites in 10gR1 & now in R2. Using the sample schema, from your performance tips atricle (part 1) I have tried to get the same results without luck. I had to generate some extra data for the fact table (about 400k rows), but I find the GSW AW using the compressed template takes twice as long as the regular sparse template. I was testing on a windows 2GB RAM,2 cpu machine, on 10.2.0.3. The only time I have seen any improvement (only slight) was by taking channel out of the CC. I seen many forum posts regarding CC’s but as yet have not seen the results myself. What could I be doing wrong.? I thought by using your example it should ensure I can see similar results.

Regards,
Imran

]]> By: Mark Rittman » New BI-Related Papers and Downloads On OTN http://www.rittmanmead.com/2005/01/05/compressed-composites-oracle-10g-compression-explained-2/comment-page-1/#comment-237 Mark Rittman » New BI-Related Papers and Downloads On OTN Sun, 26 Nov 2006 08:34:21 +0000 http://www.rittmanmead.com/wp2/2005/01/05/compressed-composites-oracle-10g-compression-explained-2/#comment-237 [...] “New Features and Performance Enhancements in Oracle OLAP 10g Release 2″ goes into a bit more detail on new 10gR2 features such as measure compression, partitioning and new SQL access enhancements, and will be useful reading if you followed my blog postings earlier this year (here, here and here) when this new release became available. If you’re interested in Oracle OLAP 10gR2 this paper for the Collaborate’06 conference might also be of interest. [...] [...] “New Features and Performance Enhancements in Oracle OLAP 10g Release 2″ goes into a bit more detail on new 10gR2 features such as measure compression, partitioning and new SQL access enhancements, and will be useful reading if you followed my blog postings earlier this year (here, here and here) when this new release became available. If you’re interested in Oracle OLAP 10gR2 this paper for the Collaborate’06 conference might also be of interest. [...]

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