Intrepreting DBQL DelayTime in Teradata 13.10 - comment by sm4073
Hi Carrie, As always I value your postings and articles and views. Based on the conclusion above, I wrote some a simple scripts and found incorrect restults. Did a deep dive into the query and found...
View ArticleIntrepreting DBQL DelayTime in Teradata 13.10 - comment by sm4073
My earlier posting (Data type differences in DBC.DBQLogTbl) were findings on TD14.10... Thank you. -- Murali
View ArticleIntrepreting DBQL DelayTime in Teradata 13.10 - comment by carrie
Murali, You are correct that DelayTime and WDDelayTime are formatted differently. Starting in 14.0, DelayTime is made into FLOAT so a user can see microseconds. WDDelayTime is still an integer,...
View ArticleTips on using Sampled Stats - comment by Santanu84
Hi Carrie Thanks for you reply. Sorry for my late response. Your explanation is really helpful. However, I have another question. For example, I have collected sample stat on a table and now going to...
View ArticleTips on using Sampled Stats - comment by carrie
Santanu, You cannot actually apply USING SAMPLE to summary stats, which are the table-level statistics new in 14.0. I'm guessing you meant you were collecting sampled stats on a column or index of...
View ArticleTips on using Sampled Stats - comment by Santanu84
Hi Carrie Thanks for your reply. I will follow your suggestions and try to explore more. I may get back to you, in case guidance is required. :-) Thanks Santanu
View ArticleWorkload Management with User Defined Functions and Table Operators - blog...
How does TASM enforce rules such as classification and workload exceptions against User Defined Functions? What about table functions and table operators, some of which do their work outside of...
View ArticleHow to Calculate Your Max Number of Usable AMP Worker Tasks - comment by Ana
Hi Carrie, could you please help me with the following question regarding AWTs consumption? - My customer has 50% COD in his TD platform (2+1HSN 6700H) - Max of AWTs crosses 62 several times which...
View ArticleHow to Calculate Your Max Number of Usable AMP Worker Tasks - comment by Ana
Hi Carrie, could you please help me with the following question regarding AWTs consumption? - My customer has 50% COD in his TD platform (2+1HSN 6700H) - Max of AWTs crosses 62 several times which...
View ArticleFastExport for Really Short Queries in Teradata 13.10 - comment by ambuj2k50
Hi Carrie, Can we export the output of multiple select statements specified with in .begin export and .end export to multiple outfiles ? If we create multiple .begin export and .end export blocks with...
View ArticleHow to Calculate Your Max Number of Usable AMP Worker Tasks - comment by carrie
Hi Ana, Releasing COD will not increase the number of AMP worker tasks to your platform, but it will increase CPU and I/O resources, so requests that are holding AWTs should be able to complete...
View ArticleFastExport for Really Short Queries in Teradata 13.10 - comment by carrie
Ambuj, I am not able to help you with this question as I am not experienced with FastExport coding conventions. I'd suggest you post your question on Teradata Forum at:...
View ArticleExpediting Express Requests - comment by SarathyG
Hi Carrie, In a senario, where we have set EnableExpediteExp = 1 and AWTs have been reserved, and we have many workloads defined under Tactical, then my understanding is that, Tactical queries are...
View ArticleExpediting Express Requests - comment by carrie
Sarathy, Although it is possible, I would not expect tactical queries to be impacted much, if at all, from competition with express requests. Express requests for the most part are extremely fast...
View ArticleTeradata 13.10 Statistics Collection Recommendations - comment by cmedved
Hi Carrie. Do you have any recommendations for statistics on a multi-level PPI where the columns used in the PPI are not in the PI? If Col1 is the PI and Col2 and Col3 are the MLPPI columns, would we...
View ArticleNew opportunities for statistics collection in Teradata 14.0 - comment by...
Hi Carrie, Thanks for nice explanation. I have query related to Summary statistics for the staging tables. Following steps are performed before loading data into final Model tables. Step 1:- Loading...
View ArticleFastExport for Really Short Queries in Teradata 13.10 - comment by ambuj2k50
Carrie, I have read the complete fastexport manuall but could not find answer to my query. Anyways i will post it in a separate thread in forum. Thanks, Ambuj
View ArticleTeradata 13.10 Statistics Collection Recommendations - comment by carrie
Whether the PPI table uses a single level of partitioning, or multiple level of partitioning, the guidelines are still the same. The fourth bullet under "Other Considerations" above provides a couple...
View ArticleNew opportunities for statistics collection in Teradata 14.0 - comment by carrie
Pinal, Statistics rows in the new DBC.StatsTbl in 14.0 refer to table id not table name. So, there is no problem with renaming a table, the stats from the old name (collected and RAS) will still be...
View ArticleWorkload Management with User Defined Functions and Table Operators - comment...
hi Carrie, While reading this article, few things triggered me to get clarified on 'delay issues on the system'. Sometimes we see too many delayed sessions in delay queue from Viewpoint. From your...
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