TAILIEUCHUNG - Microsoft SQL Server 2008 R2 Unleashed- P235

Microsoft SQL Server 2008 R2 Unleashed- P235:SQL Server 2005 provided a number of significant new features and enhancements over what was available in SQL Server 2000. This is not too surprising considering there was a five-year gap between these major SQL Server 2008 is not as much of a quantum leap forward from SQL Server 2005 | 2304 CHAPTER 55 Configuring Tuning and Optimizing SQL Server Options FIGURE The minimum server memory and maximum server memory configuration settings in SSMS. max text repl size Type Basic Default value 65536 The max text repl size parameter specifies the maximum size of the text ntext varchar max nvarchar max and image data types for columns participating in replication during single insert update writetext and updatetext statements. You might need to raise this value if the image sizes your application deals with are consistently large and the data is part of a replication configuration. The following is an example of this option exec sp_configure max text repl size 131072 go RECONFIGURE go Configuration Options and Performance 2305 max worker threads Type Basic Default value 0 SQL Server uses native operating system threads. The max worker threads parameter specifies the maximum number of threads available for SQL Server processes. One or more threads are used for supporting each network protocol for example TCP IP named pipes . SQL Server is configured to listen. The checkpoint and lazywriter processes also consume threads. A pool of threads is used to handle user connections. When the number of connections is lower than the max worker threads parameter value a thread is created for each connection. When more connections are on the server than the value defined by the max worker threads parameter SQL Server provides thread pooling for efficient resource utilization. The default value of 0 autoconfigures the number of max worker threads to be 256 number of processors - 4 x 8 for a 32-bit processor and twice that for a 64-bit processor. So for an 8 processor 32-bit machine the max worker threads value would be autoconfigured to be 256 8 - 4 x 8 288. More threads can create overhead on the system processors. Therefore lowering this value might sometimes improve the performance of a system. For a system with a few hundred user connections a reasonable value .

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