Two built-in master agents are background processes operating on each Pega 7 node. They are not defined by agents rules. (Technically, these are daemons, rather than full agents.)
The Master-for-Requestors master agent monitors idle requestor sessions to enforce automatic timeouts. By default, this occurs every 60 seconds. Your site can establish another value in the prconfig.xml file setting:
<env name="agents/requestortimeoutwakeup" value="NNN" />
The Master-for-Agents master agent starts and monitors agents defined through agents rules and agent schedule data instances. By default, the Master-for-Agents master agent awakes every ten minutes. Your site can establish another value in the prconfig.xml file setting:
<env name="agents/newqueuewakeup" value="NNN" />
where NNN is in seconds.
As an alternative to the prconfig.xml file, you can use Dynamic System Settings to configure your application.
Through prconfig.xml settings, the second master agent can detect long-running requestors, and add a line to the Alert log when one is detected.