Extents Left % (ExtentsLeftPct)

This parameter graphs the percentage of extents that are left in a non-excluded object in a non-excluded user schema. If all non-excluded objects have unlimited extents then this parameter will not have a value even if active. Does not handle rollback segments.
This parameter considers tablespace, user and object exclusion in its calculations for warnings and alarms
Only permanent tablespaces are monitored by this parameter. To monitor temporary tablespaces, you must use Smallest Free Space Available in Temporary Tablespaces (TempTSLeft) and Smallest Free Space % Available in Temporary Tablespaces (TempTSLeftPct).

Recommendations

• Enable the automated recovery feature to resize the next extent when the  Free Space Deficit (FreeSpaceDeficit)  parameter alarms.
• Enable the Autoextend option on the tablespace

The ExtentsLeftPct parameter is not supported in Locally Managed Tablespaces (LMT). If a database contains all LMT tablespaces, this parameter is de-activated. If a database contains only Dictionary Managed Tablespaces (DMT) tablespaces or both DMT and LMT tablespaces, this parameter will be online. However, in the above condition, the KM will only monitor the DMT tablespaces.

BMC PATROL properties

ORACLE_AVAILABILITY

CollAvailability

BMC ProactiveNet Performance Management properties

Oracle Database Availability