Comments on: The Core Performance Fundamentals Of Oracle Data Warehousing – Introduction http://structureddata.org/2009/12/14/the-core-performance-fundamentals-of-oracle-data-warehousing-introduction/?utm_source=rss&utm_medium=rss&utm_campaign=the-core-performance-fundamentals-of-oracle-data-warehousing-introduction Data, Databases, Performance & Scalability Mon, 30 Jan 2012 17:05:12 -0500 hourly 1 http://wordpress.org/?v=3.3.1 By: The Core Performance Fundamentals Of Oracle Data Warehousing – Table Compression | Structured Data http://structureddata.org/2009/12/14/the-core-performance-fundamentals-of-oracle-data-warehousing-introduction/#comment-15957 The Core Performance Fundamentals Of Oracle Data Warehousing – Table Compression | Structured Data Mon, 31 Jan 2011 18:20:03 +0000 http://structureddata.org/?p=668#comment-15957 [...] Of Oracle Data Warehousing – Table CompressionJanuary 19, 2010 By Greg Rahn[back to Introduction] Editor’s note: This blog post does not cover Exadata Hybrid Columnar Compression.The first [...] [...] Of Oracle Data Warehousing – Table CompressionJanuary 19, 2010 By Greg Rahn[back to Introduction] Editor’s note: This blog post does not cover Exadata Hybrid Columnar Compression.The first [...]

]]> By: The Core Performance Fundamentals Of Oracle Data Warehousing – Balanced Hardware Configuration http://structureddata.org/2009/12/14/the-core-performance-fundamentals-of-oracle-data-warehousing-introduction/#comment-12033 The Core Performance Fundamentals Of Oracle Data Warehousing – Balanced Hardware Configuration Tue, 27 Jul 2010 11:05:20 +0000 http://structureddata.org/?p=668#comment-12033 [...] Of Oracle Data Warehousing – Balanced Hardware Configuration December 22nd, 2009[back to Introduction]If you want to build a house that will stand the test of time, you need to build on a solid [...] [...] Of Oracle Data Warehousing – Balanced Hardware Configuration December 22nd, 2009[back to Introduction]If you want to build a house that will stand the test of time, you need to build on a solid [...]

]]> By: The Core Performance Fundamentals Of Oracle Data Warehousing – Set Processing vs Row Processing http://structureddata.org/2009/12/14/the-core-performance-fundamentals-of-oracle-data-warehousing-introduction/#comment-11813 The Core Performance Fundamentals Of Oracle Data Warehousing – Set Processing vs Row Processing Tue, 20 Jul 2010 21:01:54 +0000 http://structureddata.org/?p=668#comment-11813 [...] – Set Processing vs Row Processing July 20th, 2010 Goto comments Leave a comment[back to Introduction]In over six years of doing data warehouse POCs and benchmarks for clients there is one area that I [...] [...] – Set Processing vs Row Processing July 20th, 2010 Goto comments Leave a comment[back to Introduction]In over six years of doing data warehouse POCs and benchmarks for clients there is one area that I [...]

]]> By: The Core Performance Fundamentals Of Oracle Data Warehousing – Set Processing vs Row Processing http://structureddata.org/2009/12/14/the-core-performance-fundamentals-of-oracle-data-warehousing-introduction/#comment-11814 The Core Performance Fundamentals Of Oracle Data Warehousing – Set Processing vs Row Processing Tue, 20 Jul 2010 21:01:54 +0000 http://structureddata.org/?p=668#comment-11814 [...] – Set Processing vs Row Processing July 20th, 2010 Goto comments Leave a comment[back to Introduction]In over six years of doing data warehouse POCs and benchmarks for clients there is one area that I [...] [...] – Set Processing vs Row Processing July 20th, 2010 Goto comments Leave a comment[back to Introduction]In over six years of doing data warehouse POCs and benchmarks for clients there is one area that I [...]

]]> By: DW Introduction « Oracle Scratchpad http://structureddata.org/2009/12/14/the-core-performance-fundamentals-of-oracle-data-warehousing-introduction/#comment-11150 DW Introduction « Oracle Scratchpad Mon, 26 Apr 2010 16:29:20 +0000 http://structureddata.org/?p=668#comment-11150 [...] series on “Core Performance Fundamentals of Oracle Data Warehousing”. Here’s his catalogue of the first four or five articles in the [...] [...] series on “Core Performance Fundamentals of Oracle Data Warehousing”. Here’s his catalogue of the first four or five articles in the [...]

]]> By: The Core Performance Fundamentals Of Oracle Data Warehousing – Data Loading http://structureddata.org/2009/12/14/the-core-performance-fundamentals-of-oracle-data-warehousing-introduction/#comment-11119 The Core Performance Fundamentals Of Oracle Data Warehousing – Data Loading Fri, 23 Apr 2010 18:37:46 +0000 http://structureddata.org/?p=668#comment-11119 [...] Oracle Data Warehousing – Data Loading April 23rd, 2010 Goto comments Leave a comment[back to Introduction]Getting flat file data into your Oracle data warehouse is likely a daily (or more [...] [...] Oracle Data Warehousing – Data Loading April 23rd, 2010 Goto comments Leave a comment[back to Introduction]Getting flat file data into your Oracle data warehouse is likely a daily (or more [...]

]]> By: Greg Rahn http://structureddata.org/2009/12/14/the-core-performance-fundamentals-of-oracle-data-warehousing-introduction/#comment-11077 Greg Rahn Fri, 08 Jan 2010 19:30:59 +0000 http://structureddata.org/?p=668#comment-11077 @Eric Sun This comment doesn't have much of anything to do with the post and this is not a support forum but I will give you some advice this one time. Parallel Execution (PX) will use as few nodes as possible to satisfy the execution because it is more efficient to do so (why run something on 4 computers when there are enough resources to run it on 1?). Given you have only 8 slaves (maybe that is DOP=8 and there are 8 producer slaves and 8 consumer slaves, or you have DOP=4 and 4 produces/4 consumers) and 4 nodes, it seems likely that in either case 1 single node can satisfy the PX requirements. If you want to use all 4 nodes, use a DOP of the number of CPUs in the cluster (or 2x the CPUs [cpu_count] in the cluster, which is the "default" DOP). @Eric Sun

This comment doesn’t have much of anything to do with the post and this is not a support forum but I will give you some advice this one time. Parallel Execution (PX) will use as few nodes as possible to satisfy the execution because it is more efficient to do so (why run something on 4 computers when there are enough resources to run it on 1?). Given you have only 8 slaves (maybe that is DOP=8 and there are 8 producer slaves and 8 consumer slaves, or you have DOP=4 and 4 produces/4 consumers) and 4 nodes, it seems likely that in either case 1 single node can satisfy the PX requirements. If you want to use all 4 nodes, use a DOP of the number of CPUs in the cluster (or 2x the CPUs [cpu_count] in the cluster, which is the “default” DOP).

]]> By: Eric Sun http://structureddata.org/2009/12/14/the-core-performance-fundamentals-of-oracle-data-warehousing-introduction/#comment-11075 Eric Sun Fri, 08 Jan 2010 06:14:58 +0000 http://structureddata.org/?p=668#comment-11075 Hi Greg, Do you which parameters in Oracle 11g and 10g determine how the coordinator/slave queries are distributed among nodes? I've observed a strange thing in my 4-node RAC. The coordinator is on node-A, but all the 8 slaves are all on node-B. The slaves are never on the same node as coordinator. Even for full partition-wise joins among hash-partitioned tables, the slaves are never distributed across multiple nodes. Load balance is enabled in the TNS entry. Is there any fundamental setting that I missed? Thank you! Hi Greg,

Do you which parameters in Oracle 11g and 10g determine how the coordinator/slave queries are distributed among nodes? I’ve observed a strange thing in my 4-node RAC. The coordinator is on node-A, but all the 8 slaves are all on node-B. The slaves are never on the same node as coordinator. Even for full partition-wise joins among hash-partitioned tables, the slaves are never distributed across multiple nodes.

Load balance is enabled in the TNS entry. Is there any fundamental setting that I missed?

Thank you!

]]> By: Greg Rahn http://structureddata.org/2009/12/14/the-core-performance-fundamentals-of-oracle-data-warehousing-introduction/#comment-11065 Greg Rahn Mon, 04 Jan 2010 01:18:25 +0000 http://structureddata.org/?p=668#comment-11065 @Marco Gralike I spend 99% of my time in the Data Warehouse area so the topics are more DW focused, but glad that Doug guy invited you. ;) @Marco Gralike
I spend 99% of my time in the Data Warehouse area so the topics are more DW focused, but glad that Doug guy invited you. ;)

]]> By: Marco Gralike http://structureddata.org/2009/12/14/the-core-performance-fundamentals-of-oracle-data-warehousing-introduction/#comment-10930 Marco Gralike Thu, 24 Dec 2009 17:03:56 +0000 http://structureddata.org/?p=668#comment-10930 Hi Greg, indeed, I enjoyed the "chalk and talk" session very much, one of my highlights during OOW and grateful that that Scottish guy tagged me along (toys included...). I really think your insights are applicable on more than Data Warehousing so one happy guy will follow the series and see how I can make use of them in my "domain"... ;-) Hi Greg,

indeed, I enjoyed the “chalk and talk” session very much, one of my highlights during OOW and grateful that that Scottish guy tagged me along (toys included…). I really think your insights are applicable on more than Data Warehousing so one happy guy will follow the series and see how I can make use of them in my “domain”…

;-)

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