Hi,
Maximum Memory (MB) - The maximum
amount of memory that the Java virtual machine will attempt to use.
Free Memory (MB) - The amount of
memory that is available to the JVM for allocating new objects.
Total Memory (MB) - The total amount
of memory in the JVM. This value may vary over time, depending on the host
environment.
You can refer the KBA 1772632 - Explanation of Server Monitoring Metrics for SAP
BusinessObjects Business Intelligence 4.0
And Admin Guide for the explanation of server metrics:
http://help.sap.com/businessobject/product_guides/sbo41/en/sbo41sp5_bip_admin_en.pdf
Regards,
Neha