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The Task Manager has many uses Most users are only aware of the Applications tab, used to shut down a troublesome program For optimization purposes, Task Manager is a great tool for investigating how hard your RAM and CPU are working at any given moment and why The quick way to open the Task Manager is to press CTRL-SHIFT-ESC Click the Performance tab to reveal a handy screen with the most commonly used information: CPU usage, available physical memory, the size of the disk cache, Figure 1533 commit charge (memory for programs), and kernel memory (memory used by Windows) Figure 1534 shows a system with a dual-core processor, which is why you see two screens under CPU Usage History A system with a single-core processor would have a single screen Not only does Task Manager tell you how much CPU and RAM usage is taking place, it also tells you what program is using those resources Let s say your system is running slowly You open up Task Manager and see that your CPU usage is at 100 percent You then click on the Processes tab to see all the processes running on your system Click on the CPU column to sort all processes by CPU usage to see who s hogging the CPU (Figure 1535)! To shut off a process, just right-click on the process and select End Process
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Figure 1534
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Figure 1535
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Many times, a single process will open many other processes If you want to be thorough, click on End Process Tree to turn off not only the one process, but also any other processes it started Task Manager is also a great tool for turning off processes that are hogging memory Let s say you re experiencing a slowdown, but this time you also notice your hard drive light is flickering nonstop a clear sign that you ve run out of memory and the page file is now in use You go into Task Manager and see that there is no available system memory now you know the page file is in use! In order to make the PC run faster, you have got to start unloading programs but which ones By going into the Processes tab in Task Manager, you can see exactly which processes are using the most memory Just be careful not to shut down processes you don t recognize; they might be something the computer needs!
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Performance Console
Task Manager is good for identifying current problems, but what about problems that happen when you re not around What if your system is always running at a CPU utilization of 20 percent is that good or bad Windows provides a tool called the Performance console that is used to log resource usage so that you can track items such as CPU and RAM usage over time Performance is an MMC console file, PERFMONMSC, so you call it from Start | Run or through the Performance icon in Administrative Tools Use either method to open the Performance console (Figure 1536) As you can see, there are two nodes, System Monitor and Performance Logs and Alerts Objects and Counters To begin working with the Performance console, you need to understand two terms: object and counter An object is a system component that is given a set of characteristics and can be managed by the operating system as a single entity A counter tracks specific information about an object For example, the Processor object has a counter, %Processor Time, which tracks the percentage of elapsed time the processor uses to execute a non-idle thread There can be many counters associated with an object System Monitor System Monitor gathers real-time data on objects such as memory, physical disk, processor, and network, and displays this data as a graph (line graph), histogram (bar graph), or a simple report Think of System Monitor as a more detailed, customizable Task Manager When you first open the Performance console, the System Monitor shows data in graph form The data displayed is from the set of three counters listed below the chart If you want to add counters, click the Add button (the one that looks like a plus sign) or press CTRL-I to open the Add Counters dialog box Click the Performance object drop-down list and select one of the many different objects you can monitor The Add Counters dialog box includes a helpful feature; you can select a counter and click the Explain button to learn about the counter, just like Figure 1537 Try that now Even with just three counters selected, the graph can get a little busy That s where one of my favorite System Monitor features shines If you want the line of charted data from just one counter to stand out, select the counter in the list below the graph, and then press CTRL-H See how this trick makes
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