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<?xml version="1.0" encoding="utf-8" ?>
<!DOCTYPE appref SYSTEM "appref.dtd">
<appref>
<header>
<copyright>
<year>1996</year><year>2016</year>
<holder>Ericsson AB. All Rights Reserved.</holder>
</copyright>
<legalnotice>
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
</legalnotice>
<title>os_mon</title>
<prepared></prepared>
<docno></docno>
<date></date>
<rev></rev>
</header>
<app>os_mon</app>
<appsummary>OS Monitoring Application</appsummary>
<description>
<p>The operating system monitor, OS_Mon, provides the following
services:</p>
<list type="bulleted">
<item><seealso marker="cpu_sup">cpu_sup</seealso>
CPU load and utilization supervision (Unix)</item>
<item><seealso marker="disksup">disksup</seealso>
Disk supervision(Unix, Windows)</item>
<item><seealso marker="memsup">memsup</seealso>
Memory supervision (Unix, Windows, VxWorks)</item>
<item><seealso marker="os_sup">os_sup</seealso>
Interface to OS system messages (Solaris, Windows)</item>
</list>
<p>To simplify usage of OS_Mon on distributed Erlang systems, it is
not considered an error trying to use a service at a node where it
is not available (either because OS_Mon is not running, or because
the service is not available for that OS, or because the service
is not started). Instead, a warning message is issued via
<c>error_logger</c> and a dummy value is returned, which one is
specified in the man pages for the respective services.</p>
</description>
<section>
<title>Configuration</title>
<p>When OS_Mon is started, by default all services available for
the OS, except <c>os_sup</c>, are automatically started. This
configuration can be changed using the following application
configuration parameters:</p>
<taglist>
<tag><c>start_cpu_sup = bool()</c></tag>
<item>
<p>Specifies if <c>cpu_sup</c> should be started. Defaults to
<c>true</c>.</p>
</item>
<tag><c>start_disksup = bool()</c></tag>
<item>
<p>Specifies if <c>disksup</c> should be started. Defaults to
<c>true</c>.</p>
</item>
<tag><c>start_memsup = bool()</c></tag>
<item>
<p>Specifies if <c>memsup</c> should be started. Defaults to
<c>true</c>.</p>
</item>
<tag><c>start_os_sup = bool()</c></tag>
<item>
<p>Specifies if <c>os_sup</c> should be started. Defaults to
<c>false</c>.</p>
</item>
</taglist>
<p>Configuration parameters effecting the different OS_Mon services
are described in the respective man pages.</p>
<p>See <seealso marker="kernel:config">config(4)</seealso> for
information about how to change the value of configuration
parameters.</p>
</section>
<section>
<title>See Also</title>
<p><seealso marker="cpu_sup">cpu_sup(3)</seealso>,
<seealso marker="disksup">disksup(3)</seealso>,
<seealso marker="memsup">memsup(3)</seealso>,
<seealso marker="os_sup">os_sup(3)</seealso>,
<seealso marker="nteventlog">nteventlog(3)</seealso>,
<seealso marker="snmp:snmp">snmp(3)</seealso>.</p>
</section>
</appref>
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