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C. SELECT DISTINCT Employee_Second_Name FROM HumanResources.Employees WHERE SUBSTRING(Employee_Second_Name,1,1) = M D. SELECT DISTINCT Employee_Second_Name FROM HumanResources.Employees WHERE Employee_Second_Name LIKE m% 2. You are analyzing a query plan for a query that you believe is causing excessive logical read operations. You do not want to use resources on the production server, and you have no test or monitoring server. You do not have a problem with executing the query to analyze its plan. You need to find out the following information as quickly as possible:

Typically, you will be performing a trace against a production server. An active SQL Server will fill up a trace file very quickly. Use filters, if possible, to restrict the number of entries collected. Also, try to limit the number of events and columns selected. SQL Server Profiler will consume additional server resources while running a trace. If possible, use a separate server to monitor your production server remotely.

Case Scenario: Log Shipping. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 375

Background . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 375

Windows System Monitor, also known as PerfMon or Performance Monitor, is a graphical tool provided with Windows that can be used to monitor all aspects of a server s health. Like SQL Server Profiler, System Monitor provides results in real time, so you can monitor a server as it is experiencing problems. To start System Monitor, go to Start, All Programs, Administrative Tools, and Performance. Alternatively, you can type perfmon.msc from a command prompt. By default, System Monitor will display activity for the current machine. (See Figure 8-9.)

Existing Data Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 376

The total number of logical reads performed by executions of this plan since it was compiled The number of logical reads performed the last time the plan was executed The minimum and maximum number of logical reads that this plan has ever performed during a single execution

8

Proposed Environment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 377

Business Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 378

System Monitor uses performance counters to represent the measurement of a specific object or system component. For example, the processor object has a counter that captures the percentage of processor time for a particular instance. Upon execution, System Monitor will begin monitoring three default counters (as shown in Table 8-4) for the current machine.

Technical Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 378

How should you proceed A. Capture a trace by using Profiler. Run the DTA specifying this trace as a workload. B. Copy the query into Query Editor. Access the DTA directly from SSMS. C. Copy the query into Query Editor. Use the SSMS graphical execution plan facility to graphically display the data retrieval methods chosen by the SQL Server query optimizer. D. Use the sys.dm_exec_query_stats DMV.

Table 8-4