Introscope.enterprisemanager.supportability.volumespace.enable is a hidden property added in an earlier release.
If this property is set to false, APM does not poll the volume space to avoid the harvest duration spikes every 5 minute on some systems.
This property is also available in the latest EM release.
Default: introscope.enterprisemanager.supportability.volumespace.enable = true
If this property is default(true), APM can see supportability metrics under :
*SuperDomain*|Custom Metric Host (Virtual)|Custom Metric Process (Virtual)|Custom Metric Agent (Virtual)|Enterprise Manager|Data Store|Volume Space Free:xxxx
If this property is false, That is the volume space supportability metrics will not be available:
Enterprise Manager|Data Store|Volume Space Free:xxxx