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MCSA/MCSE Self-Paced Training Kit (Exam 70-270): Installing ...

MCSA/MCSE Self-Paced Training Kit (Exam 70-270): Installing ...

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!<br />

Under Memory, choose<br />

Pages/sec<br />

Under Memory, choose<br />

Available Bytes<br />

Under Paging File,<br />

choose %Usage<br />

Under Paging File,<br />

choose %Usage Peak<br />

Under Cache, choose<br />

Copy Read Hits %<br />

Lesson 2 Using the Performance Console<br />

19-17<br />

Table 19-4 Partial List of Counters That Are Available in System Monitor<br />

Counter Description<br />

Under Logical Disk,<br />

choose %Free Space<br />

Under Physical Disk,<br />

choose %Disk Time<br />

Under Physical Disk,<br />

choose Avg. Disk Queue<br />

Length<br />

<strong>Exam</strong> Tip Memorize the counters mentioned in this chapter, and understand the values of<br />

each counter that indicate a potential problem. In particular, you should remember the three<br />

default counters used in System Monitor: Pages/sec, Avg. Disk Queue Length, and %Processor<br />

Time.<br />

How to Use Performance Logs And Alerts<br />

Indicates the number of pages that were either read from disk or<br />

written to disk to make room in physical memory for other pages.<br />

This counter is the primary indicator of whether the computer has<br />

sufficient memory. An average value in excess of 20 can indicate<br />

insufficient memory in the computer.<br />

Indicates the amount of physical memory that is unallocated in the<br />

computer. Does not include any memory that is allocated to working<br />

sets or file system cache.<br />

Indicates the percentage of the paging file that is currently in use.<br />

Indicates the peak percentage of the paging file in use.<br />

Indicates the percentage of time that information was found in the<br />

file system cache and did not have to be read from disk during a<br />

file read operation (typically used by file systems and during small<br />

network transfers). A low value (lower than <strong>70</strong> percent) indicates<br />

that Windows might not have enough physical memory to keep up<br />

with the demands.<br />

Indicates the ratio of free disk space that is available to total usable<br />

disk space on a particular logical disk.<br />

Indicates the percentage of time that the selected physical disk is<br />

busy servicing read or write requests. If this value is consistently<br />

over 50 percent, the hard disk is having trouble keeping up with<br />

the load that is being placed on it.<br />

Indicates the average number of both read and write requests that<br />

are queued for the selected disk. If this value averages 2 or more,<br />

the disk is a bottleneck.<br />

Performance Logs And Alerts allows you to log counter information to a file and to trigger<br />

alerts that are based on configured events. You can automatically collect performance<br />

data from the local computer or from remote computers. You can view the

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