Resource Manager is made for you to observe Memory usage of MetaSetup itself. Memory Usage will be saved per minute and you can view the graph by clicking Help->Resource Manager
You can reset the details by clicking Reset button. Memory usage will be recorded for last 5 hours from start, currently there is no way to make the graph persistent. Recording starts with start of MetaSetup and ends at the end of software execution.
On some operating systems there isnt a way to monitor memory usage easly (for example most of WinXP), in such cases you might not see the Resource Manager menu at all or it keeps disabled.