Compared data drivers between 172.16.102.12 (RMSI) againts 172.16.11.105 (SSI-prod) and 172.16.11.106 (SSI-test), ensure that they are installed with the same driver versions, configured with same using 64bit. Played with connections using ODBC, OLEDB and DB2 to see the difference in data access performance. Lastly, set the drivers cursors to use read only to lessen the overhead.