InterSystems FAQ rubric
A tool (^GLOBUFF utility) is available to check the database cache usage for each global variable.
You can run the utility directly or programmatically in the %SYS namespace.
Here's how to run the utility directly:
InterSystems ObjectScript is a scripting language to operate with data using any data model of InterSystems Data Platform (Objects, Relational, Key-Value, Document, Globals) and to develop business logic for serverside applications on InterSystems Data Platform.