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Processor > Interrupts/Sec Shows the average number of hardware interrupts received by the processor each second. If this value is more than 3,000 on a Pentium 4 computer, you might have a problem with a program or hardware that is generating spurious interrupts. System > Processor Queue Length Used to determine whether a processor bottleneck is due to high levels of demand for processor time. If a queue of two or more items exists for an extended period of time, a processor bottleneck may be indicated.
If you suspect that a processor bottleneck is due to excessive 70-640 Exam hardware I/O requests, then you should also monitor the System > File Control Bytes/Sec counter.
If you suspect that you have a processor bottleneck, you can try the following solutions: Use applications that are less processor-intensive. Upgrade your processor.
If your computer supports multiple processors, add one. Windows Vista Business, Windows Vista Enterprise, and Windows Vista Ultimate support two physical proces- sors (regardless of the number of cores per processor), which will help if you use multi- threaded applications. You can also use processor affinity to help manage processor- intensive applications.
In Exercise 11.2, you will monitor your computer’s processor. This exercise assumes that you have completed the previous exercise in this chapter. In the Performance Monitor window, click the Add button on the toolbar. In the Add Counters dialog box, specify the following performance objects and counters:
Select Processor from the Performance Object drop-down list, select % Processor Time in the counter list box, select _Total in the Instances list box, and click Add.
Select Processor from the Performance Object drop-down list, select Interrupts/Sec in the counter list box, select _Total in the Instances list box, and click Add. Click OK. You should see these counters added to your chart.
To generate some activity, open Internet Explorer, pull up a website, and close Comptia Security Internet Explorer. You should see that the % Processor Time counter spiked during this process.
Note the Processor > % Processor Time counter. If this counter’s average is below 85%, you do not have a processor bottleneck. Note the Processor > Interrupts/Sec counter. If this counter is below 3,000 on a Pentium 4 computer, you probably do not have any processes or hardware devices that are gener- ating excessive interrupts.
Disk access is the amount of time your disk subsystem takes to retrieve data that is requested by the operating system. The two factors that determine how quickly your disk subsystem will respond to system requests are the average disk access time on your hard drive and the speed of your disk controller.
You can monitor the PhysicalDisk object, which is the sum of all logical drives on a single physical drive, or you can monitor the LogicalDisk object, which represents a specific logical disk. Here are the most important counters for monitoring the disk subsystem:
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