||It has been suggested that some portions of this article be split into articles titled System Monitor and Performance Monitor. (December 2013)|
System Monitor (sysmon.exe) is a system monitoring program in Windows 95, 98 and ME that is used to monitor various activities on a computer such as CPU usage or memory usage. The much enhanced equivalent of System Monitor in the Windows NT family,
perfmon.exe, has been variously called both System Monitor (Windows 2000, Windows XP) and Performance Monitor (Windows NT 3.x-4.0, and Windows Vista and later); it's core functionality was introduced as "Performance Monitor" in Windows NT 3.1. (The Windows 9x System Monitor binary could also be run on Windows XP, although it did not come bundled with it.) This type of application may be used to determine the cause of problems on a local or remote computer by measuring the performance of hardware, software services, and applications.
In Windows 9x, System Monitor was not installed automatically during Windows setup, but could be installed manually using the Add/Remove Programs applet, located in the Control Panel. Performance Monitor is installed automatically during Windows setup, and is available by running
perfmon.exe. The Windows 9x System Monitor had few counter available and offered little in the way of customization. In contrast, the Windows NT perfmon had over 350 counters available. Performance Monitor can display information as a graph, a bar chart, or numeric values and can update information using a range of time intervals. The categories of information that you can monitor depend on which networking services are installed on your system, but they always include File System, Kernel, and Memory Manager. Other possible categories include Microsoft Network Client, Microsoft Network Server, and protocol categories.
The functionality of the perfmon.exe program, which was called "Performance Monitor" up to NT 4.0, was migrated to a Microsoft Management Console (MMC) plug-in in Windows 2000 (perfmon.msc), and this plug-in titled itself "System Monitor" inside the MMC, while the "Administrative Tools" shortcut to it was simply called "Performance", The "System Monitor" naming for perfmon.msc was kept in Windows XP. Some third-party publications referred to perfmon.msc as "Performance Monitor" however, even in Windows 2000 or XP contexts.
The name displayed inside the MMC strictly for the original perfmon functionality was changed back to "Performance Monitor" in Windows Vista, although it was also bundled with a Reliability Monitor and with a new performance summary feature called Resource Overview; the whole was called Performance and Reliability Monitor. In Windows 7, the resource overview feature was split to a stand-alone Resource Monitor application, with the landing page for the Performance Monitor in Windows 7 containing a pointer to the (new) Resource Monitor; Windows 7 also moved the Reliability Monitor to the Action Center. A new feature added to the Performance Monitor in Windows Vista is Data Collector Set, which allows sets of accounting parameters to be easily manipulated as a group.
- "Using Performance Monitor", TechNet Library (Microsoft), retrieved 2013-06-18
- Michael D. Reilly, "The Windows NT Performance Monitor" March 1997
- Rahul Sharma (2002). Microsoft SQL Server 2000: A Guide to Enhancements and New Features. Addison-Wesley Professional. p. 314. ISBN 978-0-201-75283-0.
- Curt Simmons (2005). How to Do Everything with Windows XP, Third Edition. McGraw Hill Professional. p. 354. ISBN 978-0-07-225953-7.
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