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Webinar Follow-Up: SSIS Performance Tuning Techniques

Posted Aug 22, 2014 by Liz Hamilton

Instructor: Mitchell Pearson

Click here to watch the entire webinar.

Click here to view Mitchell's blog.

Thank you everyone for attending my webinar on SSIS Performance Tuning.

Below are some of the questions that I received from the Webinar:

Q: Can you give some performance tips in using script tasks too?

A: Yea, don’t use them! Script tasks can be really bad for performance and 
many times I have been able to replace someone else’s code with native SSIS 
components. For example, I had situation where the client was using some very 
complicated .net code to parse out columns based on logic. The package was 
taking over an hour to process 1 million records. I replaced this with some 
conditional splits and derived columns and it now runs in 3 minutes.

Q:  I am assuming that the file formats must be the same for all files when 
using the MultiFlatFile transform, correct?

A: You are absolutely correct. The metadata in each file must match.

Q: PW delivers a 'TF Advanced Lookup Cache Transform" component.  What are 
the benefits of using this component over the Cache Transform covered earlier?  
It seems that the TF components cannot make use of the same result set when the 
data set is role based.

A: For basic caching of data I would use the native SSIS cache transform. The 
major advantage you get from the Task Factory component is you can do very 
difficult range lookups with ease and  they will perform at a high level. Please 
see my blog post on this.

Q: What version of SQL Server is being used?

A: I was using SQL 2012, but everything in the presentation is applicable to 
2005 and 2008.

Q: With the multi flatfile connection manager can you specify specific 
types?

A:  Yes, the wild card character can be anywhere in the connection string 
property. So you could do test*.txt to only pull in text files where the file 
name begins with test.

Q: Why would you ever not use table or view (fast load) option in the OLEDB 
Destination?

A: Well I personally would always use that option. However, with the fast 
load option all records are committed for the entire batch. So if there is a 
record that is bad and causes the failure you will not know which record caused 
the error. With table or view option each record is committed individually so 
you know exactly which record caused the failure.

Thanks again!

Tagged With: SSIS, performance tuning


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