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Archives of the TeradataForum
Message Posted: Tue, 25 Apr 2007 @ 01:53:52 GMT
Subj: | | Re: How to improve MLoad performance |
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From: | | bob hahn |
A starting point is to understand the bottleneck which might be Teradata capacity/contention, client cpu capacity/contention, client network or
i/o. For client cpu, multiload output reports the client cpu which you can compare to acquisition phase elapsed time. If they are close, it is a
client cpu bottleneck. Multiload client cpu can be high with vartext, nulliff, apply where. It uses much less client cpu with binary/fastload
format data and no field manipulations since it can copy the rows directly rather than have to go field by field. Also, 1 session is definitely
a bottleneck. With multiple sessions (8 is usually good) Multiload should never have to wait for Teradata but will always have another session on
which it can send the next buffer.
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