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One optimization you can perform on both Windows 2000 and Windows XP is setting Performance Options Performance Options are used to configure CPU, RAM, and virtual memory (page file) settings To access these options, right-
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CHAPTER 19 Maintaining, Optimizing, and Troubleshooting Windows 2000/XP
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click My Computer and select Properties, click the Advanced tab, and click the Options button (Windows 2000) or Settings button (Windows XP) in the Performance section of that tab The Performance Options dialog box differs between the two families of OSs In Windows 2000, the Performance Options dialog box shows a pair of radio buttons called Applications and Background Services These radio buttons set how processor time is divided between the foreground application and all other background tasks Set this to Applications if you run applications that need more processor time Set it to Background Services to give all running programs the same processor usage You can also adjust the size of the page file in this dialog box, but in most cases I don t mess with these settings and instead leave control of the page file to Windows The Windows XP Performance Options dialog box has three tabs: Visual Effects, Advanced, and Data Execution Prevention (Figure 1927) The Visual Effects tab enables you to adjust visual effects that impact performance Try clicking the top three choices in turn and watch the list of settings Notice the
FIGURE 1927
Windows XP Performance Options dialog box
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tiny difference between the first two choices The third choice, Adjust for best performance, turns off all visual effects, and the fourth option is an invitation to make your own adjustments If you re on a computer that barely supports Windows XP, turning off visual effects can make a huge difference in the responsiveness of the computer For the most part, though, just leave these settings alone The Advanced tab, shown in Figure 1928, has three sections: Processor scheduling, Memory usage, and Virtual memory Under the Processor scheduling section, you can choose to adjust for best performance of either Programs or Background services The Memory usage settings enable you to allocate a greater share of memory to programs or to the system cache Finally, the Virtual memory section of this page enables you to modify the size and location of the page file Microsoft introduced Data Execution Prevention (DEP) with Windows XP Service Pack 2 DEP works in the background to stop viruses and other malware from taking over programs loaded in system memory It doesn t prevent viruses
FIGURE 1928
Advanced tab of Performance Options dialog box
CHAPTER 19 Maintaining, Optimizing, and Troubleshooting Windows 2000/XP
from being installed on your computer, but it does make them less effective By default, DEP monitors only critical OS files in RAM, but the Data Execution Prevention tab enables you to have DEP monitor all running programs It works, but you ll take a performance hit Like other options in the Performance Options dialog box, leaving the DEP settings as default is the best option most of the time
Resource Tracking
One big issue with optimization is knowing when something needs optimization Let s say your Windows computer seems to be running more slowly Resource tracking is important for identifying the performance problem Task Manager and the Performance console are tools you can use to figure out what (if anything) has become a bottleneck
Task Manager
The Task Manager has many uses Most users are aware of only 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, commit charge (memory for programs), and kernel memory (memory used by Windows) Figure 1929 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 occurring, but it also tells you what program is using those resources Let s say your system is running slowly You open Task Manager and see that your CPU usage is at 100 percent You then click the Processes tab to see all the processes running on your system Click the CPU column to sort all processes by CPU usage to see who s hogging the CPU (Figure 1930) To shut off a process, just right-click the process and select End Process Many times a single process will open many other processes If you want to be thorough, click End Process Tree to turn off not only the one process, but also any other processes it started
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