Databases Reference
In-Depth Information
Reliability and Performance Monitor comprises three components: Monitoring Tools, Data
Collector Sets, and Reports. This chapter focuses on Performance Monitor and Data Collector Sets.
Monitoring Tools comprises Performance Monitor (PerfMon), which is the tool of choice when
investigating server-wide or resource problems; and Reliability Monitor, which reports on system
stability.
Resource Overview
Once Reliability and Performance Monitor is launched, the Resource Overview screen is displayed
showing real-time performance data. The Resource Overview provides a visual representation of
each of the four key hardware elements: CPU, Disk, Network, and Memory. Each element can be
expanded to reveal a list of processes, listed in descending order by resource type; for example,
when CPU is expanded, all processes are listed ordered by Average CPU descending, as shown in
Figure 10-1.
FIGURE 10-1
In addition to the four individual performance graphs displayed across the top of the Resource
Overview, each resource element displays two mini-performance bars. It's worth noting that for
CPU, when looking at this on your own PC, the green bar displays the current CPU utilization and
the blue bar displays the maximum CPU frequency. Some computers may have maximum CPU
frequency less than 100% when operating in energy-saving modes. If you're interested in reading
further — there's more detail on CPU performance and powersaving mode in Chapter 2. The Memory
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