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I have customer with Application and Data Servers. Users access the Application Server which obtains the data from the Data Server. Recently, a new Application Server was introduced to replace the original.

The old Server was a Windows Server 2008 R2 Standard SP1. The new Server is a Windows Server 2019 Standard.

The access speeds using the new Server are noticeably slower than when using the old Server, especially when thousands of rows are being returned. The Data Server is now in the same building (It was not before). The cabling and switches are now all high speed (They were not before).

My thoughts are turning to the Drivers on the new Server being slower in some way to those on the old server.

The old Server had the MS SQL Server 2008 R2 and the Native Client drivers, as well as the 2012 Native Client. The new Server has two MS ODBC Drivers (Version 11 & 13) and the 2012 Native Client.

I would have thought that the 2012 Native Client would have kept the speed to at least the same level as before, but obviously not.

I would appreciate any suggestions as to what might be causing this.

本文标签： performanceWhy is the return of data so slow with new serverStack Overflow

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