Comments on: Choosing An Optimal Stats Gathering Strategy http://structureddata.org/2008/03/26/choosing-an-optimal-stats-gathering-strategy/?utm_source=rss&utm_medium=rss&utm_campaign=choosing-an-optimal-stats-gathering-strategy Data, Databases, Performance & Scalability Mon, 30 Jan 2012 17:05:12 -0500 hourly 1 http://wordpress.org/?v=3.3.1 By: Greg Rahn http://structureddata.org/2008/03/26/choosing-an-optimal-stats-gathering-strategy/#comment-24194 Greg Rahn Sun, 13 Nov 2011 05:34:49 +0000 http://structureddata.org/2008/03/26/choosing-an-optimal-stats-gathering-strategy/#comment-24194 Did you read the blog post? What are my comments about choosing a sample size? Did you read the blog post? What are my comments about choosing a sample size?

]]> By: DBA http://structureddata.org/2008/03/26/choosing-an-optimal-stats-gathering-strategy/#comment-24185 DBA Sat, 12 Nov 2011 10:28:15 +0000 http://structureddata.org/2008/03/26/choosing-an-optimal-stats-gathering-strategy/#comment-24185 We use estimate_percent=100 on a 2 node RAC.We have highly DML prone tables ranging from 4g to 50.0gb. It takes a lot of time to calculate statistics. I always think do we really need to sample 100% ANy inputs from you guys as to what could be more appropriate sample size? We use estimate_percent=100 on a 2 node RAC.We have highly DML prone tables ranging from 4g to 50.0gb. It takes a lot of time to calculate statistics. I always think do we really need to sample 100%
ANy inputs from you guys as to what could be more appropriate sample size?

]]> By: בורסה http://structureddata.org/2008/03/26/choosing-an-optimal-stats-gathering-strategy/#comment-23324 בורסה Wed, 05 Oct 2011 13:29:44 +0000 http://structureddata.org/2008/03/26/choosing-an-optimal-stats-gathering-strategy/#comment-23324 Excellent post. I used to be checking continuously this weblog and I am inspired! Extremely helpful info specifically the last phase :) I deal with such information much. I used to be seeking this certain info for a long time. Thank you and best of luck. Excellent post. I used to be checking continuously this weblog and I am inspired! Extremely helpful info specifically the last phase :) I deal with such information much. I used to be seeking this certain info for a long time. Thank you and best of luck.

]]> By: Global statistics high/low values when using DBMS_STATS.COPY_TABLE_STATS « RNM http://structureddata.org/2008/03/26/choosing-an-optimal-stats-gathering-strategy/#comment-20727 Global statistics high/low values when using DBMS_STATS.COPY_TABLE_STATS « RNM Wed, 13 Jul 2011 09:23:17 +0000 http://structureddata.org/2008/03/26/choosing-an-optimal-stats-gathering-strategy/#comment-20727 [...] Greg Rahn – Choosing An Optimal Stats Gathering Strategy [...] [...] Greg Rahn – Choosing An Optimal Stats Gathering Strategy [...]

]]> By: Data Warehousing and Statistics in Oracle 11g – Automatic Optimizer Statistics Collection « RNM http://structureddata.org/2008/03/26/choosing-an-optimal-stats-gathering-strategy/#comment-18201 Data Warehousing and Statistics in Oracle 11g – Automatic Optimizer Statistics Collection « RNM Thu, 26 May 2011 12:35:37 +0000 http://structureddata.org/2008/03/26/choosing-an-optimal-stats-gathering-strategy/#comment-18201 [...] we say around here, if you want a job done properly, do it tha’ sen. Or rather, as Greg Rahn more articulately says: I tend to advise people that for a DW the stats gathering should be part of the data flow (ETL/ELT) [...] [...] we say around here, if you want a job done properly, do it tha’ sen. Or rather, as Greg Rahn more articulately says: I tend to advise people that for a DW the stats gathering should be part of the data flow (ETL/ELT) [...]

]]> By: Greg Rahn http://structureddata.org/2008/03/26/choosing-an-optimal-stats-gathering-strategy/#comment-13197 Greg Rahn Tue, 28 Sep 2010 14:49:08 +0000 http://structureddata.org/2008/03/26/choosing-an-optimal-stats-gathering-strategy/#comment-13197 @CJ You are absolutely correct. I tend to advise people that for a DW the stats gathering should be part of the data flow (ETL/ELT) process and to disable the default job. For trickle fed or OLTP databases the default stats job generally works well. @CJ

You are absolutely correct. I tend to advise people that for a DW the stats gathering should be part of the data flow (ETL/ELT) process and to disable the default job. For trickle fed or OLTP databases the default stats job generally works well.

]]> By: CJ http://structureddata.org/2008/03/26/choosing-an-optimal-stats-gathering-strategy/#comment-13196 CJ Tue, 28 Sep 2010 13:01:00 +0000 http://structureddata.org/2008/03/26/choosing-an-optimal-stats-gathering-strategy/#comment-13196 Great article.. but I wish you had more clearly highlighted the importance of TIMING of gathering stats. WHEN to gather stats is a critical part of the stats gathering strategy, and one that needs planning in advance. For example - you cannot allow the default gather_stats_job to overlap with your ETL batch run. Another example - a staging table will need to be analyzed as soon as it is populated and before it is used in any queries. Great article.. but I wish you had more clearly highlighted the importance of TIMING of gathering stats. WHEN to gather stats is a critical part of the stats gathering strategy, and one that needs planning in advance.

For example – you cannot allow the default gather_stats_job to overlap with your ETL batch run. Another example – a staging table will need to be analyzed as soon as it is populated and before it is used in any queries.

]]> By: 2009 Year-End Zeitgeist http://structureddata.org/2008/03/26/choosing-an-optimal-stats-gathering-strategy/#comment-11061 2009 Year-End Zeitgeist Mon, 04 Jan 2010 00:10:57 +0000 http://structureddata.org/2008/03/26/choosing-an-optimal-stats-gathering-strategy/#comment-11061 [...] Choosing An Optimal Stats Gathering Strategy [...] [...] Choosing An Optimal Stats Gathering Strategy [...]

]]> By: Happy Anniversary To The Structured Data Blog | Structured Data http://structureddata.org/2008/03/26/choosing-an-optimal-stats-gathering-strategy/#comment-195 Happy Anniversary To The Structured Data Blog | Structured Data Mon, 23 Feb 2009 15:00:03 +0000 http://structureddata.org/2008/03/26/choosing-an-optimal-stats-gathering-strategy/#comment-195 [...] Choosing An Optimal Stats Gathering Strategy [...] [...] Choosing An Optimal Stats Gathering Strategy [...]

]]> By: Gathering Statistics « Oracle Database Blog http://structureddata.org/2008/03/26/choosing-an-optimal-stats-gathering-strategy/#comment-200 Gathering Statistics « Oracle Database Blog Tue, 06 Jan 2009 09:43:10 +0000 http://structureddata.org/2008/03/26/choosing-an-optimal-stats-gathering-strategy/#comment-200 [...] http://structureddata.org/2008/03/26/choosing-an-optimal-stats-gathering-strategy/ [...] [...] http://structureddata.org/2008/03/26/choosing-an-optimal-stats-gathering-strategy/ [...]

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