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  SQL Server Tips by Robin Schumacher

Other Parameters that Deserve a Look

There are only a few more configuration parameters that may need tweaking from time to time; the network packet size parameter; the fill factor configuration parameter; and the priority boost parameter.

The network packet size parameter controls the size of the fixed chunks of data that are sent back and forth between clients and SQL Server. If there is an application that routinely bulk loads lots of data into a database or transfers large volumes of text or image data, this parameter can be increased from its default of four KB. Another performance indicator is increased wait count and wait time activity in the NETWORKIO wait event of SQL Server. Increasing the parameter to eight KB or more can result in fewer network reads and writes.

The fill factor configuration parameter globally controls the fillfactor amount used for index creation operations that do not specify the fillfactor option. An upcoming section will deal more thoroughly with fillfactor, but for now, if the DBA knows that there are SQL Server-driven applications that are very INSERT and UPDATE intensive, this option can be changed to something other than the default. This normally involves changing fillfactor to a figure in the neighborhood of 50-70%.

Finally, if the Windows server is a dedicated SQL Server machine, the priority boost parameter can be set to a value of one. This indicates that SQL Server should run at a higher priority than other processes on the Windows machine. Microsoft only recommends doing this on multi-CPU boxes that are dedicated to running SQL Server.

The above book excerpt is from:

High-Performance SQL Server DBA
Tuning & Optimization Secrets

ISBN: 0-9761573-6-5
Robin Schumacher  


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