Additional Resources; Installed Documentation - Red Hat ENTERPRISE LINUX 4 - INTRODUCTION TO SYSTEM ADMINISTRATION Administration Manual

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Where:
< sample-count >
•
< sample-percent >
•
< unused-field >
•
< executable-name >
•
ples were collected.
This report (produced on a mostly-idle system) shows that nearly half of all samples were taken while
the CPU was running code within the kernel itself. Next in line was the OProfile data collection
daemon, followed by a variety of libraries and the X Window System server,
noting that for the system running this sample session, the counter value of 6000 used represents the
minimum value recommended by
particular system — OProfile overhead at its highest consumes roughly 11% of the CPU.

2.6. Additional Resources

This section includes various resources that can be used to learn more about resource monitoring and
the Red Hat Enterprise Linux-specific subject matter discussed in this chapter.

2.6.1. Installed Documentation

The following resources are installed in the course of a typical Red Hat Enterprise Linux installation.
man page — Learn how to display free and used memory statistics.
• free(1)
man page — Learn how to display CPU utilization and process-level statistics.
• top(1)
man page — Learn how to periodically execute a user-specified program, displaying
• watch(1)
fullscreen output.
GNOME System Monitor Help menu entry — Learn how to graphically display process, CPU,
•
memory, and disk space utilization statistics.
man page — Learn how to display a concise overview of process, memory, swap, I/O,
• vmstat(8)
system, and CPU utilization.
man page — Learn how to display CPU and I/O statistics.
• iostat(1)
man page — Learn how to display individual CPU statistics on multiprocessor sys-
• mpstat(1)
tems.
man page — Learn how to collects system utilization data.
• sadc(8)
man page — Learn about a script that runs
•
sa1(8)
man page — Learn how to produce system resource utilization reports.
• sar(1)
man page — Learn how to produce daily system resource utilization report files.
• sa2(8)
man page — Learn how to change process scheduling priority.
• nice(1)
man page — Learn how to profile system performance.
• oprofile(1)
•
op_visualise(1)
represents the number of samples collected
represents the percentage of all samples collected for this specific executable
is a field that is not used
represents the name of the file containing executable code for which sam-
opcontrol --list-events
man page — Learn how to graphically display OProfile data.
Chapter 2. Resource Monitoring
. This means that — at least for this
periodically.
sadc
. It is worth
XFree86