New opportunities for statistics collection in Teradata 14.0 - comment by...
Hi Carrie, I am having some doubts regarding the automatic stats collection process. Currently i am working on Version 13.10 and we are doing the stats collection on big/important tables on daily...
View ArticleNew opportunities for statistics collection in Teradata 14.0 - comment by carrie
Response to sk73: 1. You do not need to recollect summary stats. Summary stats are automatically collected on the table any time column/index stats are collected. 2. In terms of the threshold...
View ArticleHow Resources are Shared in the SLES 11 Priority Scheduler - comment by carrie
1. Just a point of clarity, in SLES 11 the allocation is to the workload, not a group of workloads as in SLES 10. To decide the appropriate allocation (aka share percent), look at peak CPU usage...
View ArticleUtility Throttles – You Won’t Regret It! - comment by Arif_M
Hi Carrie, We are using utility throttles at workload level. We have recently observed that TPTEXP jobs in responding state are holding on to the utility slots in TASM and causing other jobs to wait in...
View ArticleRecommended Dictionary Statistics to Collect in Teradata 14.0 - comment by...
Santanu, I am not someone who works with PDCR or can explain detail about PDCR to you. Best to ask that question to people from the Teradata Professional Services organization or post it on the...
View ArticleNew opportunities for statistics collection in Teradata 14.0 - comment by carrie
Vasudev, I have written a blog posting that provides a summary of the AutoStats feature. I believe your question is answered in that posting. It is titled: Easing into Using the New AsutoStats...
View ArticleUtility Throttles – You Won’t Regret It! - comment by carrie
Arif, FastExport holds onto the utility slot until the end of the job, just as is the case with load utilities. So what you are experiencing is expected behavior. This is true whether you are using...
View ArticleHow Resources are Shared in the SLES 11 Priority Scheduler - comment by...
Thanks Carrie for your responses. -Suhail
View ArticleRecommended Dictionary Statistics to Collect in Teradata 14.0 - comment by...
Thanks Carrie for your reply. Thanking You Santanu
View ArticleElevating Parsing Priority - comment by Pigula
Hello, Carrie. This article is helpful, especially the list of things that can impact parsing elapsed time. The customer has a very complex query that runs in a total of 22.5 seconds, of which 17.5...
View ArticleNew opportunities for statistics collection in Teradata 14.0 - comment by...
Thank you very much carrie....
View ArticleRecommended Dictionary Statistics to Collect in Teradata 14.0 - comment by tglas
Hi Carrie, Thank you for documenting these. Would these be the same statistics that would be recommended for collection on v14.10, or would there be some different recommendations for 14.10?
View ArticleElevating Parsing Priority - comment by carrie
Hi Bill, Unfortunately, I don't have any suggestions I can make to improve parsing time on an appliance. The comments made in my blog posting apply only to sites with TASM and that have defined...
View ArticleRecommended Dictionary Statistics to Collect in Teradata 14.0 - comment by...
There are no new recommendations for 14.10 in terms of which dictionary statistics to collect, so I would just continue to collect stats on these dictionary tables, and if you find additional...
View ArticleChanges to the TASM AMP Worker Task Event in Teradata 13.10 - comment by...
Just wanted to understand, how much the default system can handle the requests simulatenously.... We say that the limitations of : a. one PE can handle 120 sessions in parallel...
View ArticleChanges to the TASM AMP Worker Task Event in Teradata 13.10 - comment by carrie
Requests are different from tasks. The request comes from the user within a user session. One request can be sumitted through a session at one time. Usually, each AMP will use from 1 to 2 tasks to...
View ArticleAutomatic Throttles in Teradata 14.0 and 14.10 - comment by joe.ruvolo
Carrie We have some questions around the throttle rule type definitions of Collective, Individual, Member and Global. When we first upgraded from v13.10/SLES 10 to v14.10/SLES 11, the TASM rules...
View ArticleStatistics collection recommendations – Teradata 14.0 - comment by eejimkos
Hello Carrie , I would like to ask three more question concerning the stats , if it is possible. 1.If i will make a new table with different DDL (change some columns from varchar(20) to (10) or verca )...
View ArticleAutomatic Throttles in Teradata 14.0 and 14.10 - comment by carrie
Hi Joe, As far as I can see from your comments below, you are setting up the rule correctly. There are no changes in 14.10 to how throttle enforcement options (Individual, Collective, Members) are...
View ArticleStatistics collection recommendations – Teradata 14.0 - comment by carrie
1. You can copy stats whether or not a column definition in the source table has changed. Copied stats are for an unchanged column will be fine. And if the column changed does not involve any...
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