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SQL SSIS to Oracle CLOB Performance Issue.. Expand / Collapse
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Posted Tuesday, November 19, 2013 7:51 AM


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Hi

I'm attempting to push data from SQL via SSIS DT_TEXT to an oracle CLOB field, but performance is utterly horrendous.

It's currently migrating the data at 400 rows per min.

my requirement is to migration 5 million rows - so approximately 210 hours at present - which is not do-able.

I've taken an average row size and set the default buffer max rows. I'd also set out with the intention of using Attunity drivers, but CLOB is not supported in SQL 2008 R2.

Has anyone else pushed data to oracle and do you have any performance tuning tips /ideas I can try?

as always - your time and help are greatly appreciated.



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MCITP: Business Intelligence Developer (2005)
Post #1515562
Posted Tuesday, May 6, 2014 3:05 AM
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I'm trying to do exactly the same thing and I'm also experiencing horrendous write speeds into Oracle when writing a CLOB through SSIS.

I've been looking everywhere and can't find any good information on this.

Does anyone have any ideas?

Thanks,

David
Post #1567840
Posted Tuesday, May 6, 2014 3:30 AM


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Hi dave.

We used SQL 2012 with the oracle attunity 2.0 data connector in the end.

It's still not what I would call fast but we got our data migration down to around 7 hours.... So if you can look at using the above.

Hope that helps you.


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MCITP: Business Intelligence Developer (2005)
Post #1567849
Posted Tuesday, May 6, 2014 3:35 AM
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Hi,

Thanks for your reply. I'm using SQL Server 2012 and Attunity's Oracle destination but i'm only getting a throughput of about 100 rows / sec when writing a CLOB. This still seems pretty slow. What sort of speeds are you getting?

Thanks,

Dave
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