Additional Resources; Installed Documentation - Red Hat ENTERPRISE LINUX 3 - 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 — Displays free and used memory statistics.
• free(1)
man page — Displays CPU utilization and process-level statistics.
• top(1)
man page — Periodically executes the specified program, displaying fullscreen output.
• watch(1)
GNOME System Monitor Help menu entry — Graphically displays process, CPU, memory, and
•
disk space utilization statistics.
man page — Displays a concise overview of process, memory, swap, I/O, system, and
•
vmstat(8)
CPU utilization.
man page — Displays CPU and I/O statistics.
• iostat(1)
man page — Displays individual CPU statistics on multiprocessor systems.
• mpstat(1)
man page — Collects system utilization data.
• sadc(8)
man page — A script that runs
• sa1(8)
man page — Produces system resource utilization reports.
•
sar(1)
man page — Produces daily system resource utilization report files.
• sa2(8)
man page — Changes process scheduling priority.
• nice(1)
man page — Profiles 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 — Graphically displays OProfile data.
periodically.
sadc
Chapter 2. Resource Monitoring
XFree86
. This means that — at least for this
. It is worth