Archives of the TeradataForum
Message Posted: Thu, 03 Jul 2003 @ 14:29:14 GMT
Subj: | | Re: Question about insert |
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From: | | Belle, Patrick A |
Here're three things I'd look for:
1- Make sure your target table is empty... This'll reduce the journaling overhead
2- Make sure your target table has the same primary index as the source table, otherwise, you'll redistribute the entire source
table.
3- Check the uniqueness of the primary index on the target table. If you have a large number of PI occurrences with more than 10000+
counts, you could be spending all of your time validating uniqueness of rows in the Non-Unique Primary Index (NUPI) chains. You can get
around this by defining your target table to be multi-set (this bypasses the uniqueness check, but this might be ok if you're copying data
from an existing table.).
Pat Belle
Certified Master
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