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AMP Usage Via SQL
Please could someone point me in the direction of some DBC sql which I can run while a query is running to see what AMPs it is using? (I am having an issue with SPOOL space running out, and I think it's because I have skewed data, where the query is only using one or two of the full amount of...- terminalclick
- Thread
- Replies: 2
- Forum: NCR: Teradata
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Data Distribution Using Primary Index
Hi, I think I'm correct in saying that the Primary Index is set against a table to effect data distribution across AMPs. So, in effect, a good primary index is a column containing unique data. Am I therefore correct in thinking that if a 'serial' column is added to a table to just count from 1...- terminalclick
- Thread
- Replies: 1
- Forum: NCR: Teradata
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Skew Factor vs Primary Indexes vs AMPs used
First time post, so please bare with me. :-) Please could someone explain the relationship between Skew Factor on Primary Indexes and which AMPs will be used? Am I right in thinking the skew factor on a primary index is where there are large variances in the amount of different primary index...- terminalclick
- Thread
- Replies: 1
- Forum: NCR: Teradata
