MS SQLServer Linked Server is performing slow when using Oracle OLEDB Provider compared to MSDASQL or ODBC drivers
(Doc ID 1996475.1)
Last updated on AUGUST 31, 2020
Applies to:Oracle Provider for OLE DB - Version 184.108.40.206 and later
Information in this document applies to any platform.
The linked server query using Oracle OLEDB Provider is taking 4 minutes to run compared to 1 minute in 10g client. Query used is on a table with VARCHAR and Number columns and have good number of rows like 200k or more.
select * into openquery('select * from table_name;');
Have upgraded the MS SQL Server or the Oracle Client or both recently.
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