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Because of space considerations, Practice 1 is an introduction to the Performance Log tool. You can expand the listed procedure by adding more counters or by adding performance objects rather than specific counters. You can also capture the data in a SQL Server database. To accomplish the latter task, you need to use the Data Source Wizard to define a data source. For more information, search for How to: Define a Data Source Using the Data Source Wizard in SQL Server 2005 Books Online or access msdn2.microsoft.com/en-us/library/ms174543.aspx.

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Much of our careers with SQL Server have focused around either achieving the maximum uptime or fixing performance issues Performance issues occur in a variety of ways, but every issue always comes back to a single cause: resources Companies try the equivalent of throw more hardware at the problem by changing servers, adding memory, adding disks, and so on This rarely solves the performance problem Most professionals dealing with performance usually start with the code that has been written to access the data and find a variety of changes that can be made to improve performance or even solve the issue Rarely does anyone look into the table structure, simply because it is generally not pos sible to change table structures after a database is in production Unfortunately, structure issues are always at the core of every performance issue.

For SQL Server to utilize certificates for SSL encryption, they must be valid and must meet the following conditions:

We spent two weeks with one customer, analyzing the environment and docu menting all the performance issues that were apparent now that the applications were having to process larger and larger volumes of data We found lots of ways to improve queries so that they were more efficient and read less data There were additional improvements that could be made that reduced the amount of code that had to be executed to come to a final result Over the course of two weeks, we identified hundreds of queries that could be improved and changed several dozen of them Unfortunately, all the changes combined could not over come the most fundamental issue in the entire application: table design The entire application essentially revolved around dates and scheduling items into time blocks However, the application never dealt with actual dates It was always dealing with either minutes or seconds; never with dates.

The certificate must be in either the local computer certificate store or the current user certificate store. The current system time must be after the Valid From property of the certificate and before the Valid To property of the certificate. The certificate must be meant for server authentication. This requires the Enhanced Key Usage property of the certificate to specify Server Authentication (1.3.6.1.5.5.7.3.1).

Unfortunately, when the tables were designed, everything was stored in a datetime data type Every query running in the system had to call a function that converted the data into minutes and seconds that could be used by the application Then every time a change had to be made, the application had to convert the minutes and sec onds that it used back into a datetime value to store it in the database (Because of a nonstandard business week definition, none of the date or time functions in SQL Server could be used).

1. Log in to your domain at your member server by using either your domain administrator account or an account that has been added to the sysadmin server role. (If you are using virtual machine software, log on to your domain and connect to your member server.) 2. From the Programs (or All Programs) menu, choose Administrative Tools, choose Performance, and then choose System Monitor. Click Add Counters (the + button), and display the Performance Object drop-down menu. Figure 1-1 shows some of the performance objects added by SQL Server. The name of your member server might differ from that shown in the figure, depending on your test lab setup. 3. Close the Add Counters dialog box. 4. Expand Performance Logs and Alerts. Select Counter logs. 5. From the Action menu, choose New Log Settings. Name the new log MyCounterLog, and click OK. The MyCounterLog dialog box is shown in Figure 1-2.