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SSIS Data Flow Task Slow! Expand / Collapse
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Posted Monday, May 04, 2009 2:14 PM
Grasshopper

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I'm having nearly identical symptoms with a step in a DTSX package (search SQL Server Central forums for "DTSX package step stalls"). It's really frustrating since it impacts the entire package.

Any help on this issue is greatly appreciated.
Post #709703
Posted Monday, May 04, 2009 4:46 PM
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This thread didn't go anywhere because the Original Poster only provided some of the information that I needed to understand what was going on.

Please post the following information, starting with the name of the transform that is slow:

Tim Wilson-Brown (4/8/2009)


Can you post CREATE Table statements and create index statements for the source and target tables, and a screenshot of the data flow that's causing the problem.

Can you take a screenshot of the data flow when it's paused as well?

Can you also give me an idea of the number of rows that the data flow processes.


Tim Wilson-Brown (4/13/2009)

When the package pauses, which transforms (inside the data flow task) are green and which are yellow?

Did the package run any faster when you scheduled it as a SQL Server job?


Edited to remove unnecessary comments from quotes.
Post #709812
Posted Tuesday, May 05, 2009 9:33 AM
Grasshopper

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OK. I got mine to perform more like expected.

On the DTSX step (Data Flow Task), I changed the DefaultBufferSize from 10485760 to 40485760.

Total execution time went from 20 minutes+ down to 6 seconds.

I hope this helps someone else.
Post #710376
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