
[[ref-daemon-config-files-perspectivepoller]]
= PerspectivePoller
:description: Learn about the PerspectivePoller in OpenNMS {page-component-title}, which queries aggregated percentage availability for a given specific application and its services.

Queries aggregated percentage availability for a given specific application and its services, as part of xref:operation:deep-dive/service-assurance/application-perspective-monitoring/introduction.adoc[Application Perspective Monitoring].

.PerspectivePoller log file overview
[options="header"]
[cols="2,3"]
|===
| File
| Description

| perspectivepoller.log
| Logs relating to perspectivePoller server events.
|===
