Flow Control and Spawned Work - comment by SKS
Hi Carrie, Thanks a lot for such valuable input. one question: Do we have any specific 'work type' AWT (out of 0-15 work type) that is used for dedicately maintaining the message queue itself? Or is it...
View ArticleUsing the ResUsageSAWT table to Monitor AMP Worker Tasks - comment by...
Hi carrie, Is it recommended to change or increase number of AWTs. And if yes then from where I can change it?
View ArticleAre AMP Worker Tasks used by FastExport in Response Mode? - comment by carrie
Idle sessions are sessions that are between database requests. They do not have any active work that could be holding AMP worker tasks on the AMPs. And you are correct that there is no machanism to...
View ArticleFlow Control and Spawned Work - comment by carrie
The message queue is not maintained using AMP worker tasks. A combination of system services and event-driven PDE internal processes do that work. Thanks, -Carrie
View ArticleStatistics collection recommendations – Teradata 14.0 - comment by gsasubi
Thank you Carrie, Would like to know the scenario, where this Parameterized Macro supports/works ?. Example like - it supports only BTEQ utility..
View ArticleUsing the ResUsageSAWT table to Monitor AMP Worker Tasks - comment by carrie
Muhammad, It is not generally recommended to increase the number of AMP worker tasks per AMP. Usually it only makes sense if there are platform resources that cannot be used and when there is...
View ArticleStatistics collection recommendations – Teradata 14.0 - comment by Ekladios
Hi Carrie, Regarding Sample Stats; is it possible and feasible to define AMP(s) as well as percentage for the sampling? What I have in mind is column(s) badly distributed, Hashamp/bucket/row, and then...
View ArticleStatistics collection recommendations – Teradata 14.0 - comment by Ekladios
Hi Carrie, When collecting sample stats on a table and join it to itself it ignores sample stats and cause product join, is this true? Thanks, Adel
View ArticleStatistics collection recommendations – Teradata 14.0 - comment by carrie
Adel, On your first question: I see your point, however there is no functionality to allow you to sample on only specific AMPs. All AMPs will be sampled at the same percent. On your second...
View ArticleHow to set a System-Level CPU limit for Capacity-on-Demand - comment by...
Hi Carrie, Based on your earlier response:"Resusage will still show the same number of CPU seconds and will still show 100% CPU utilization when a full workload is running. But each of those CPU second...
View ArticleEntering and Exiting a TASM State - comment by gsasubi
I have a small dought on DBQL log entries: Why a simple (one time submitted) SELECT statement makes two records in DBC.DBQLOGTBL with diff QUERYID ?. You know my java team is submitted a single SELECT...
View ArticleHow to set a System-Level CPU limit for Capacity-on-Demand - comment by carrie
Suahil, If you are talking about PM COD (platform metering COD), then DBQL seconds to perform the same query should go down somewhat-proportionately with the change in percentage of PM COD. So what...
View ArticleEntering and Exiting a TASM State - comment by carrie
I am not an expert in the JDBC area, but my undestanding is that you will get two rows in DBQL with JDBC queries, one for the Prepare, and one for the query execution. The row with the Prepare will...
View ArticleSimplifying AMP Worker Task Monitoring and Getting it Right - comment by...
Hi Carrie, why are awt requirements for the first phases of a fastload vs an mload different? FastLoad or TPT Load Operator:Phase I: 3 AWTs per AMP (1 sender, 2 receivers) Phase II: 1 AWT/AMP MultiLoad...
View ArticleHow to set a System-Level CPU limit for Capacity-on-Demand - comment by...
Thank you Carrie for your response. Regards, -Suhail
View ArticleRequest Cache Hits & Misses - comment by suhailmemon84
hi carrie, how can we restrict a tactical application or an ETL job to a specified PE so that its probability of a request cache hit increases? Regards, -Suhail
View ArticleAre AMP Worker Tasks used by FastExport in Response Mode? - comment by...
Hi, i want to know how I can copy a database or user schema from the development environment to the production environment. I want to do export of all structure of a database and do the import in other...
View ArticleSimplifying AMP Worker Task Monitoring and Getting it Right - comment by carrie
Suhail, Fastload has two receiver tasks (a workone and a worktwo) while MultiLoad only has one (workone) during the acquisition phase. This is because FastLoad uses a pre-sort approach when initially...
View ArticleAre AMP Worker Tasks used by FastExport in Response Mode? - comment by carrie
I do not have an answer to the question. In order to get the best response for technical questions you have that are unrelated to the topic of the blog posting, please post them on Teradata Forum at:...
View ArticleRequest Cache Hits & Misses - comment by carrie
Suhail, Suhail, I don't know the exact process for doing this. It has to do with defining a host group that links to sessions coming from specific IP addresses with specific PEs. Your CS person...
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