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Archives of the TeradataForum
Message Posted: Tue, 05 Apr 2005 @ 23:46:50 GMT
Subj: | | Re: Fetch Time from DBQL |
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From: | | Ballinger, Carrie |
The DBQL StartTime is when the parser first sees the query. If you have workload limits (throttles in V2R6) in place, and if a query were to
be delayed, that delay happens at the dispatcher level, downstream from the parser. A delay would cause what you are labeling as DBMS_time to
include the time the query was waiting in the delay queue.
If you want to eliminate potential delay time, DBMS time could be expressed as FirstRespTime - FirstStepTime.
The FirstStepTime is the moment when the dispatcher sends the message for the first step to the AMP(s).
Thanks, -Carrie
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