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The CPU usage shows the total current percentage usage in green; the blue line shows the CPU maximum frequency percentage, which is the current maximum frequency of the processor Why is it not always 100% To save power, a big driver for Windows Server 2008 If you access the Power Options control panel applet, you see several power plans: balanced, power saver, and high performance Access the advanced power options via the Change Advanced Power Settings link by selecting Change Plan Settings As shown in Figure 20-12, you can select the minimum and maximum processor state
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FIGURE 20-12 The processor advanced options Unless you are in the high-performance power option mode, the blue line tracks around 70% higher than the in-use CPU This gives spare CPU resources in case more processor is required However, if there is a large spike, there might be a slight lag while the maximum frequency is increased enough to cater for the resource need In high-performance mode, the maximum frequency is always at 100%, ensuring there will never be a lag in the processor power needed The CPU detail display shows the image (executable) list of currently running processes, the process ID, the description of the process, the number of threads the process is using, the current CPU usage (% of the total CPU capability), and the average CPU usage of the process
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The disk resource overview shows the total number of KB/sec of the disk use (with the scale shown at the top-right for example, 100 KB/sec) The blue line shows the highest active time percentage The detail information is broken down by le handle for disk and shows the image name of the process and process ID, the le being accessed, and the amount of read and write activity in bytes per minute, along with the IO priority and response time in milliseconds for the disk activity (see Figure 20-13)
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FIGURE 20-13 The detailed disk output The network overview shows the total amount of network traf c by the green line (with the scale shown at the top-right for example, 56 kbps) The blue line shows the percentage of available bandwidth used The detailed view for the network shows the image and process ID that is communicating with a remote host, along with the send and receive in bytes per minute and the total (see Figure 20-14)
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FIGURE 20-14 The detailed network output The Memory overview shows the number of hard page faults per second via the green line (with the scale for the line shown at the top-right for example, 100 hard faults) The blue line shows the percentage of physical memory in use Remember that a hard fault occurs when a page of
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20 Troubleshooting Windows Server 2008 and Vista Environments
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memory is addressed that has been swapped out to the page le This causes a performance hit because the page has to be moved back into physical memory before it can be used The detailed memory view breaks down the memory use into the process image and the ID, along with the number of hard faults per minute for the application If high, this would indicate a cause for the process to run slowly The commit size is the amount of virtual memory committed to the process (for example, page le allocation) This does not mean the process has that amount of memory paged out to page le, just that it has that amount reserved for it in the page le The working set size is the amount of kilobytes residing in memory for the use of the application, the shareable memory size is memory other applications can use out of the working set; the private area is not shared out of the working set, as shown in Figure 20-15
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