Comments on: Oracle Parallel Execution: Interconnect Myths And Misunderstandings http://structureddata.org/2009/07/06/oracle-parallel-execution-interconnect-myths-and-misunderstandings/ Oracle Database Performance And Scalability Blog Mon, 01 Mar 2010 22:11:26 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: Greg Rahn http://structureddata.org/2009/07/06/oracle-parallel-execution-interconnect-myths-and-misunderstandings/comment-page-1/#comment-563 Greg Rahn Thu, 17 Sep 2009 05:58:19 +0000 http://structureddata.org/?p=602#comment-563 <a href="#comment-10002" rel="nofollow">@hrishy</a> The table is range partitioned on the column that represents the event time stamp, which I believe is DAY_KEY, using 1 day partitions. @hrishy

The table is range partitioned on the column that represents the event time stamp, which I believe is DAY_KEY, using 1 day partitions.

]]> By: hrishy http://structureddata.org/2009/07/06/oracle-parallel-execution-interconnect-myths-and-misunderstandings/comment-page-1/#comment-562 hrishy Thu, 17 Sep 2009 05:50:40 +0000 http://structureddata.org/?p=602#comment-562 <a href="#comment-9997" rel="nofollow">@Greg Rahn </a> Hi Apologies for not being clear. In the experiement you carried out you say you have hash subpartitioned the table dwb_rtl_trx t1.From the results it is obvious that the hash sub partition was on trx_nbr. Say for example You might have range partitoned the table dwb_rtl_trx based on some key then hash sub partitioned by trx_nbr. My question is what was the key that was used to range partition the table first ? regards @Greg Rahn
Hi

Apologies for not being clear.
In the experiement you carried out you say you have hash subpartitioned the table dwb_rtl_trx t1.From the results it is obvious that the hash sub partition was on trx_nbr.

Say for example You might have range partitoned the table dwb_rtl_trx based on some key then hash sub partitioned by trx_nbr.

My question is what was the key that was used to range partition the table first ?

regards

]]> By: Greg Rahn http://structureddata.org/2009/07/06/oracle-parallel-execution-interconnect-myths-and-misunderstandings/comment-page-1/#comment-565 Greg Rahn Wed, 16 Sep 2009 14:32:40 +0000 http://structureddata.org/?p=602#comment-565 <a href="#comment-9995" rel="nofollow">@hrishy</a> You question is unclear. Can you restate it? @hrishy

You question is unclear. Can you restate it?

]]> By: hrishy http://structureddata.org/2009/07/06/oracle-parallel-execution-interconnect-myths-and-misunderstandings/comment-page-1/#comment-564 hrishy Wed, 16 Sep 2009 06:41:38 +0000 http://structureddata.org/?p=602#comment-564 <a href="#comment-9510" rel="nofollow">@Greg Rahn </a> Hi Greg A simple statement like CREATE TABLE DWB_RTL_TRX .... PARTITION BY RANGE (??) SUBPARTITION BY HASH(trx_nbr) would do i am curious of the ?? there @Greg Rahn
Hi Greg

A simple statement like

CREATE TABLE DWB_RTL_TRX
….
PARTITION BY RANGE (??)
SUBPARTITION BY HASH(trx_nbr)

would do i am curious of the ?? there

]]> By: Uwe Hesse http://structureddata.org/2009/07/06/oracle-parallel-execution-interconnect-myths-and-misunderstandings/comment-page-1/#comment-561 Uwe Hesse Thu, 13 Aug 2009 18:09:04 +0000 http://structureddata.org/?p=602#comment-561 Hi Greg, thank you for this excellent demonstration and explanation about parallelization across multiple nodes in a RAC. That is indeed an area that is still not very well known and also not very well covered in our documentation (and even in our Oracle University course material). Kind regards Uwe Hi Greg,
thank you for this excellent demonstration and explanation about parallelization across multiple nodes in a RAC. That is indeed an area that is still not very well known and also not very well covered in our documentation (and even in our Oracle University course material).

Kind regards
Uwe

]]> By: Greg Rahn http://structureddata.org/2009/07/06/oracle-parallel-execution-interconnect-myths-and-misunderstandings/comment-page-1/#comment-572 Greg Rahn Thu, 30 Jul 2009 06:30:21 +0000 http://structureddata.org/?p=602#comment-572 <a href="#comment-9509" rel="nofollow">@hrishy</a> I can not post the entire definition, is there something in particular you are looking for? @hrishy
I can not post the entire definition, is there something in particular you are looking for?

]]> By: hrishy http://structureddata.org/2009/07/06/oracle-parallel-execution-interconnect-myths-and-misunderstandings/comment-page-1/#comment-571 hrishy Thu, 30 Jul 2009 06:19:26 +0000 http://structureddata.org/?p=602#comment-571 Hi Greg Can you please post the DDL for the table when you hash subpartitioned on TRX_NBR Hi Greg

Can you please post the DDL for the table when you hash subpartitioned on TRX_NBR

]]> By: The Best Oracle Parallel Execution Paper - Doug's Oracle Blog http://structureddata.org/2009/07/06/oracle-parallel-execution-interconnect-myths-and-misunderstandings/comment-page-1/#comment-559 The Best Oracle Parallel Execution Paper - Doug's Oracle Blog Tue, 21 Jul 2009 20:15:07 +0000 http://structureddata.org/?p=602#comment-559 [...] Best Oracle Parallel Execution Paper I'd already made a note to read and blog about Greg Rahn's Parallel Execution over RAC blog post which is excellent, as usual, but Jonathan Lewis beat me to it What struck me when I [...] [...] Best Oracle Parallel Execution Paper I'd already made a note to read and blog about Greg Rahn's Parallel Execution over RAC blog post which is excellent, as usual, but Jonathan Lewis beat me to it What struck me when I [...]

]]> By: Oracle Parallel Execution: Interconnect Myths And Misunderstandings « EveryDay EssBase http://structureddata.org/2009/07/06/oracle-parallel-execution-interconnect-myths-and-misunderstandings/comment-page-1/#comment-570 Oracle Parallel Execution: Interconnect Myths And Misunderstandings « EveryDay EssBase Sat, 11 Jul 2009 10:23:09 +0000 http://structureddata.org/?p=602#comment-570 [...] Oracle Parallel Execution: Interconnect Myths And Misunderstandings Oracle Parallel Execution: Interconnect Myths And Misunderstandings [...] [...] Oracle Parallel Execution: Interconnect Myths And Misunderstandings Oracle Parallel Execution: Interconnect Myths And Misunderstandings [...]

]]> By: Must Read « Oracle Scratchpad http://structureddata.org/2009/07/06/oracle-parallel-execution-interconnect-myths-and-misunderstandings/comment-page-1/#comment-569 Must Read « Oracle Scratchpad Fri, 10 Jul 2009 19:11:23 +0000 http://structureddata.org/?p=602#comment-569 [...] Lewis @ 7:10 pm UTC Jul 10,2009 Just a quick note to point out that Greg Rahn has just published some useful information on parallel execution (including an important addition to monitoring in [...] [...] Lewis @ 7:10 pm UTC Jul 10,2009 Just a quick note to point out that Greg Rahn has just published some useful information on parallel execution (including an important addition to monitoring in [...]

]]>