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Message Posted: Tue, 25 Apr 2007 @ 01:53:52 GMT


     
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Subj:   Re: How to improve MLoad performance
 
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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