docs/en-US/admin-alerts.xml

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<section id="admin-alerts">
    <title>Administrator Alerts</title>
    <para>The system provides alerts and events to help with the management of the cloud. Alerts are notices to an administrator, generally delivered by e-mail, notifying the administrator that an error has occurred in the cloud. Alert behavior is configurable.</para>
    <para>Events track all of the user and administrator actions in the cloud. For example, every guest VM start creates an associated event. Events are stored in the Management Server’s database.</para>
    <para>Emails will be sent to administrators under the following circumstances:</para>
    <itemizedlist>
        <listitem><para>The Management Server cluster runs low on CPU, memory, or storage resources</para></listitem>
        <listitem><para>The Management Server loses heartbeat from a Host for more than 3 minutes</para></listitem>
        <listitem><para>The Host cluster runs low on CPU, memory, or storage resources</para></listitem>
    </itemizedlist>      
</section>