Database Tasks that Run on the Parsing Engine - comment by carrie
I don't think there is any "ideal" parsing time, at least that I have heard of one. Parsing time depends on many things, such as the type of work that is undergoing parsing (how complex it is, what...
View ArticleNew opportunities for statistics collection in Teradata 14.0 - comment by firstj
Thanks Carrie, very much appreciated
View ArticleNew opportunities for statistics collection in Teradata 14.0 - comment by firstj
Carrie, one more question - would the same rules apply volatile tables and would the syntax be: - COLLECT STATISTICS INDEX ( COLUMN1, COLUMN2 ) ,COLUMN (COLUMN3) ON...
View ArticleRecommended Dictionary Statistics to Collect in Teradata 14.0 - comment by...
TVM and Dbase are both tables that commonly have stats collected on them. So I don't see a problem with collecting stats in addition to the ones usually recommended for those tables, if you see an...
View ArticleEasing Into Using the New AutoStats Feature - comment by ganya
Hi Carrie We upgraded from TD 13.10 to TD 14.10. I am trying to implement automated stats using your excellent blog. What other TD 14.10 features that can be implemented that you would recommend? thanks
View ArticleNew opportunities for statistics collection in Teradata 14.0 - comment by carrie
The rules that apply to a global temp table in terms of stats collection do not apply to volatile tables. Global temp table have a definition in the dictionary, but volatile tables do not. Volatile...
View ArticleEasing Into Using the New AutoStats Feature - comment by carrie
Unfortunately, I am not able to give you specific recommendations on what to implement because I am not familiar with your site. And I don't have first hand experience with most of enhancements and...
View ArticleStatistics Collection Recommendations – Teradata 14.10, 15.0 and 15.10 -...
Hi Carrie, Wanted to check is there any way we can disable stats extrapolation. Truning off All-AMP dynamic Amp sampling will help here. Also can you suggest any article/tool to well interpret...
View ArticleAMP Worker Task Resource Limits & Increased Load Limits for MLOADX - comment...
Hi Carrie, (Not directly related to Workload management of MLOADX, but...) if TPT UPDATE switches to using MLOADX and is loading a table (eitehr inserts or updates, because it is now using SQL...
View ArticleTeradata Basics: Parallelism - comment by LUCAS
Hi Carrie, late reading but learning much, thank you for this article. About multi-statement you said "any sub-expressions that the different SQL statements have in common will be executed once and the...
View ArticleAMP Worker Task Resource Limits & Increased Load Limits for MLOADX - comment...
Hi Dave, It depends (sorry). With MLOADX, whether freespace percent will be honored depends on the operations being utilized within the utility. if you are doing updates to existing rows in the...
View ArticleStatistics Collection Recommendations – Teradata 14.10, 15.0 and 15.10 -...
Here is a link for an article here on Dev X that describes STATSUSAGE and XMLPLAN: http://developer.teradata.com/database/articles/identifying-used-unused-and-missing-statistics There is no way to...
View ArticleTeradata Basics: Parallelism - comment by carrie
Hi Pierre, I am concerned that you may have misiinterpreted one of the details in the posting. This statement that you quote: "any sub-expressions that the different SQL statements have in common...
View ArticleAMP Worker Task Resource Limits & Increased Load Limits for MLOADX - comment...
Hi Carrie, Many thanks. Dave
View ArticleStatistics Collection Recommendations – Teradata 14.10, 15.0 and 15.10 -...
Thank you Carrie. In Teradata, do we have any way to collect statistics for a particular day/incremental statistics for Partitioned Tables. Some thing similar to Incremental Gloabl Statistics in Oracle...
View ArticleStatistics Collection Recommendations – Teradata 14.10, 15.0 and 15.10 -...
There is no method for just collecting incremental statistics on Teradata currently. You can collect stats on expressions starting in 14.1, but that will not help you with a partitioned table....
View ArticleThings that Run in the Session Workload - comment by StevenSchmid
Hi Carrie Thanks the article, very informative as always. Do you think we could classify the "Call" stored procedure statement in the parsing only workload as AMPCPUTime is usually 0, or should they be...
View ArticleRejection CAN be Rewarding - comment by amar3009
Hi Carrie, Hope you are doing good. I would request your help here. I am trying to avoid Full Table Scans on one of our big tables. I tried to create a filter, but it is working fine for the queries...
View ArticleRejection CAN be Rewarding - comment by carrie
Amar, You need to add the table as target selection criteria first, then specify no table scans as subcriteria to that table: If you want the filter rule to apply only to full table scans on Table...
View ArticleSimplifying AMP Worker Task Monitoring and Getting it Right - comment by...
One question, when the value of TheTime is '04:10:00.00' all the data regarding awts refers to the interval from 04:00 to 04:10 or refers to the interval 04:10 to 04:20?
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