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The Windows Performance Monitor is useful for monitoring operating system-level performance. The GUI can be started up on a Windows 2K server in the Administrative Tools icon on the Control Panel. This tool allows graphical display of all aspects of hardware and operating system-level activity. Figure 21.15 shows a picture of a dual-CPU server displaying both processors, memory, and network activity for a relatively idle database server.
Figure 21.15: The Windows Performance Monitor
Figure 21.16 on the other hand shows the Windows Performance Monitor GUI for a highly active single-CPU system. The Windows Task Manager snapshot is added to show how busy this system was when these screenshots were taken.
Figure 21.16: This is a Very Busy Server
There are a multitude of command line and GUI tools used for operating system monitoring and tuning in other operating systems such as Unix or Linux.
There are a plethora of tools used in all flavors of Unix and Linux operating systems, both command line utilities and GUI-based monitoring tools. These tools are some of the command line monitoring tools used on Solaris.
CPU Usage. sar, vmstat, mpstat, iostat.
Disk I/O Activity. sar, iostat.
Memory Usage. sar, vmstat.
Network Usage. netstat.
Since I am not an experienced systems administrator I see no point in attempting to explain the detailed syntax and use of these tools.
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