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The Processes tab (shown in Figure 12-7) lists all the current user s processes running on the computer. When you select the Show Processes From All Users check box, the list includes all services and other system processes in addition to user-level applications. By choosing Select Columns from the View menu, you can add or remove columns of data, including processor, memory, and I/O utilization. You can sort by any column by clicking the column header. By right-clicking any process, you can change the priority of processor time that the process receives, set the processor affinity on multiple processor computers, and end a process. For processes that have child or related processes, you can end all related processes by choosing End Process Tree. If you needed to end a mail application, for example, you might also need to end the MAPI spooler; appropriately, you would right-click the mail application and choose to End Process Tree. The Processes tab is shown in Figure 12-7.
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Monitoring Microsoft Windows Server 2003
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The Processes tab of Task Manager
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Changing settings of a process such as priority or processor affinity can have an adverse effect on the performance of other applications running on your computer. Ending a process, especially a process tree, should be done only after normal termination procedures have failed. Windows Server 2003, thankfully, safeguards its processes from termination through Task Manager, but they are still susceptible to resource starvation through inappropriate priority adjustment of other processes.
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Performance Tab
The Performance tab displays a real-time view of key elements of your computer s performance and memory use. There are graphs displaying the current usage for each processor and memory usage. Numerical displays show physical, kernel, and commit memory utilization, as well as the number of handles, threads, and active processes. The Performance tab is shown in Figure 12-8.
Lesson 3
Using Task Manager
12-23
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Figure 12-8
The Performance tab of Task Manager
Networking Tab
The Networking tab (shown in Figure 12-9) shows all active network connections by name with their connection speed, bandwidth utilization percentage, and operational status. There is also a graph displaying the bandwidth utilization for the currently selected network connection.
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Figure 12-9
The Networking tab of Task Manager
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Users Tab
The Users tab (shown in Figure 12-10) lists all users who are logged on to the computer. Logged-on users may be local at the console or remotely attached from the network. Using the controls on this tab, you can log off users, forcibly disconnect users from computers, or send messages to users. (It certainly is polite to tell them before you disconnect them.)
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Figure 12-10
The Users tab of Task Manager
Practice: Task Manager
In this practice, you will use Task Manager to start an application and identify its process. 1. Right-click an open section of the taskbar and choose Task Manager from the shortcut menu. 2. In the Applications tab, click New Task. Type explorer, and then click OK. Windows Explorer will open focused on its default window (typically My Documents), and the My Documents (or other focus window) application name will appear in the Application tab of Task Manager. 3. Right-click the newly opened application name, and choose Go To Process. The focus in Task Manager changes to the Processes tab, and the Explorer.exe process is highlighted. From this point, as a situation involving applications and Task Manager warrants, you can adjust the priority of the process or end it.
Lesson 3
Using Task Manager
12-25
Lesson Review
The following questions are intended to reinforce key information presented in this lesson. If you are unable to answer a question, review the lesson materials and try the question again. You can find answers to the questions in the Questions and Answers section at the end of this chapter. 1. What information can Task Manager provide about the performance of applications
2. Your computer crashes with almost clocklike predictability approximately one hour after each system startup. You suspect an application with a memory leak that is causing the system to run out of memory. How can you use Task Manager to determine which application is causing the problem
3. You are running a database application on your computer. Your computer has two processors. You want the database application to run on the second processor. How can you use Task Manager to do this
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