Statistics collection recommendations – Teradata 14.0 - comment by eejimkos
Hello, Thank you one more time for your replies. Concerning the (2) , i did not set the question correctly (and correct me again , since i am not very familiar with TASM). I wanted to understund , if...
View ArticleStatistics collection recommendations – Teradata 14.0 - comment by carrie
Even simple queries may benefit from stats collections whether or not you are using TASM. And since statistics are collected on a table's columns/indexes, not on the query, it is possible other more...
View ArticleNew opportunities for statistics collection in Teradata 14.0 - comment by shri85
Hi All, When I do help stats over my table, I do see the result set containing '*' in column names, Column dictinary names, & Column Sql names. Does it mean that the stats have been done for the...
View ArticleNew opportunities for statistics collection in Teradata 14.0 - comment by carrie
Srini, The asterisk that you see in the first row of output for the HELP STATS under the "Column Names" column indicates that you are viewing row count of the table at the time the statistics were...
View ArticleUsing the ResUsageSAWT table to Monitor AMP Worker Tasks - comment by...
Thanks Carrie, very useful!
View ArticleRecommended Dictionary Statistics to Collect in Teradata 14.0 - comment by...
ABOUT BLOB AND CLOB:- ===================== 1. BLOB:- A. STANDS FOR 'BYNARY LARGE OBJECT'. B. REPRESENTS A LARGE BINARY STRING OF RAW BYTES. C. LIKE A VARBYTE BUT UP TO APPROXIMATELY 2 GB (2097088000)....
View ArticleUtility Session Management - It's Inside the Database in Teradata 13.10!...
Hi Carrie I've got a question about calculating the number of sessions to be used as the default. We have a 16 node system, however our busiest ETL server is connected via a private LAN and that...
View ArticleAutomatic Throttles in Teradata 14.0 and 14.10 - comment by Sravankumar.bodla
Hi Carrie, We are using appliance box and are on TD 14.10, by default, we see that, a rule set is ACTIVE. I have disabled/deleted the throttle settings, but, unable to deactivate the default rule set....
View ArticleUtility Session Management - It's Inside the Database in Teradata 13.10!...
Hello Carrie That was really an informative blog. I have a few questions regarding TPT Update API Using Informatica,Current DBS Control settings are MaxLoadtasks: 15 and Maxloadawt is Zero. When i...
View ArticleUtility Session Management - It's Inside the Database in Teradata 13.10!...
Ricky, The calculation used by session management is based on the number of AMPs in the system. LAN configuration, or even the number of nodes, is not considered. Thanks, -Carrie
View ArticleUtility Session Management - It's Inside the Database in Teradata 13.10!...
Raghav, If you relying on MaxLoadTask to manage the concurrency of utility jobs, you will never get the delay option. When MaxLoadTask finds that a new load utility job would exceed the limit for...
View ArticleAutomatic Throttles in Teradata 14.0 and 14.10 - comment by carrie
Sravan, I'm assuming you are on SLES 11, as you mention TIWM. You are not allowed to deactivate the default rule set on an appliance, once you start using TIWM on SLES 11. You used to be able to do...
View ArticleExpediting Express Requests - blog entry by carrie
If I told you there was a way you might be able to speed up parsing time for your queries, would you be interested? In Teradata Database 14.10.02 there is a new capability that allows you to expedite...
View ArticleTeradata 13.10 Statistics Collection Recommendations - comment by rraghuram64
Hi carrie, I have some confusion in choosing a right one for the multi column statistic .. I have table which have Multi column USI ,Multi column partition columns ,muti columns participating in NUSI...
View ArticleTeradata 13.10 Statistics Collection Recommendations - comment by carrie
You do not usually need statistics on a USI. The optimizer knows a unique column is unique and that there will be one row for each distinct value, so statistics will not add any benefit, unless you...
View ArticleElevating Parsing Priority - comment by Somik.Dalal
Hi Carrie, How Parsing Priority can be adjusted on TD 14.10 version? Can we set up Parsing only workload on TD 14.10 version? Regards - Somik
View ArticleElevating Parsing Priority - comment by carrie
Somik, Yes. Everything described in the posting above applies to 14.10 and later Teradata releases as well. Parsing will run under the Session WDID in 14.10, just as it has for all the realeases...
View ArticleElevating Parsing Priority - comment by Somik.Dalal
Thanks Carrie for your response. Regards - Somik
View ArticleNew opportunities for statistics collection in Teradata 14.0 - comment by...
Hi Carrie, Starting with Teradata 12 or 13 (cannot remember), we collected stats on column PARTITION on ALL our tables (partition tables and non partition tables),as we were advised. With TD14.10 now,...
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