Improved performance for single-threaded applications

You are likely to improve the performance of single-threaded applications by using the SINGLETHREADED connection parameter. The value is off by default.

Do not use this parameter in an XA/MSDTC environment. You can set the SINGLETHREADED connection parameter in a connection string as the following example shows:
DSN=xxx;Uid=xxx;Pwd=xxx;SINGLETHREADED=1;"