Use transaction DBACOCKPIT to check the memory size of the system.
o Sensor KPI in Gb
o System on 87,27 %
General information on the sensor:
warning: no warning level,
error: no error level,
sensor name: DBMEMORY DBA memory,
parameter value: IN_GB:Y,
class/method: ZCL_SENSORS_DBACOCKPIT=>SENSOR_DBMEMORY,
duration: 13ms.