Slow Performance Querying SQL SERVER Tables From Oracle Using DG4MSQL (Doc ID 2066796.1)

Last updated on JULY 17, 2017

Applies to:

Oracle Database Gateway for SQL Server - Version 11.2.0.1 and later
Information in this document applies to any platform.

Symptoms

When performing a query from Oracle via Oracle Database Gateway for SQL*Server (DG4MSQL) some queries hang or have slow performance.

Example: 

  
Running the same query directly in SQL*Server also hangs or is slow.  By adding the NOLOCK command on the SQL*Server side then
the query returns in milliseconds.

Cause

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