Penalty Box Over-Population - comment by mohdmufid4u
Hi Carrie, Thanks again for wonderful article.. very helpful and you are making all of us in forum a little Carrie :) Couple of questions I have in my mind. We are a finance company and aborting batch...
View ArticleStatistics collection recommendations – Teradata 14.0 - comment by venkatarayudu
Hi i am new to teradata can you plz any one explain me about collect statistics..
View ArticleStatistics collection recommendations – Teradata 14.0 - comment by suhailmemon84
Hi Carrie, From TD 14, will "PARTITION" stats on PPI tables help the optimizer in stats extrapolation at all? The reason I asked is because we have a daily script that collects stats on keyword:...
View ArticleIndex Maintenance During Mini-Batch Processing - comment by carrie
Hi Raja, You can certainly use the HASH BY COLUMN or HASH BY RANDOM options, if you are on 14.0. They work on any NOPI table (column-partitioned or not), but not on tables that have a primary index....
View ArticlePenalty Box Over-Population - comment by carrie
It's usually a good idea if you can identify poorly-written queries before they run and create filter rules in TASM to reject them before they begin to run. I have seen such rules be very successful...
View ArticleStatistics collection recommendations – Teradata 14.0 - comment by carrie
To venkatarayudu: The official Teradata documentation has background and explanatory information about statistics collection. Go to http://www.info.teradata.com/ This manual has some detail about...
View ArticleStatistics collection recommendations – Teradata 14.0 - comment by carrie
To Suhail, It is always a good thing to collect stats on PARTITION for all partitioned tables. It is not used for extrapolation in 14.0, but is important for optimizer decisions when building the...
View ArticleStatistics collection recommendations – Teradata 14.0 - comment by suhailmemon84
Hello Carrie, Thank you for your response. As I mentioned before, we have a daily script that collects PARTITION stats on all partitioned tables. Post TD 14, should I change our script to collect...
View ArticleStatistics collection recommendations – Teradata 14.0 - comment by carrie
Suhail, You do not need to collect summary stats, unless no other stats have been collected on the table during the recent timeframe. Summary stats are automatically collected every time normal...
View ArticleStatistics collection recommendations – Teradata 14.0 - comment by Ramki@99
Hi Carrie, In our system incoming data from source files is not consistence, one day 10K rows and other day 10m rows So, to avoid spool space issues we checking loaded data manually and triggering...
View ArticleTASM State Changes are Streamlined in Teradata 14.0 - comment by Smarak0604
Hello Carrie,If more than 1 events are active at the same time, the action is decided by severity of the action. How is the Severity decided ? I wish to know the same for Exceptions arising at the same...
View ArticleStatistics collection recommendations – Teradata 14.0 - comment by carrie
Ram, I am not aware of any such script, but your could post your questoin on one of the Teradata forums and see if anyone in Professional Services or anyone working at a Teradata site has done...
View ArticleTASM State Changes are Streamlined in Teradata 14.0 - comment by carrie
Two system events could be triggered at the same point in time. At each event interval, a check is done to see if any system events have taken place. It is possible more than one event has been...
View ArticleStatistics collection recommendations – Teradata 14.0 - comment by chodankarcc
Hi Carrie, I have observed new thing while collecting stats on my table. Recently we have upgraded to TD 14. After collecting stats on Index and column, I can see in 'help stats' that its showing one...
View ArticleStatistics collection recommendations – Teradata 14.0 - comment by carrie
Hi Chetan, In 14.0 the HELP STATS statement has been enhanced to show a summary of the table's statistical information. The first row of output, which will display an asterisk under Column Names,...
View ArticleIntrepreting DBQL DelayTime in Teradata 13.10 - comment by barryhull
Hi Carrie, In the past, whenever I've had to refresh a table (delete all of the rows and insert all new rows), I have used two tables and have used a view to switch between the tables. So, if the view...
View ArticleStatistics collection recommendations – Teradata 14.0 - comment by chodankarcc
Thats cool! Thanks carrie, appreciate your help! -Chetan
View ArticleIntrepreting DBQL DelayTime in Teradata 13.10 - comment by carrie
Hi Barry, Even if you were not delaying these queries, there is still a small window of time between query optimization and query start time where the replace view command could get submitted and where...
View ArticleClik here to view.
Automatic Throttles in Teradata 14.0 and 14.10 - blog entry by carrie
I just returned from the 2013 Teradata user group Partners Conference in Dallas. One of the technical topics that I presented at the conference was throttle rules and how they work. Throttles provide...
View ArticleUsing the ResUsageSAWT table to Monitor AMP Worker Tasks - comment by vasudev
Hi Carrie, I am using TD 12, What is the significance of FlowControlled field in resusageawt table? I can see in Resource usage book, that if it is non-zero amp was flow controlled. I got the...
View Article