The following table lists the types and the overview of the functionality that requires the class-wise statistical functionality.

Table 9-3 Types and overview of the functionality that requires the class-wise statistical functionality

Types	Overview	Reference
Instance statistical functionality	Outputs the total size of instances that have instances of class as members, for each class.	9.4
STATIC member statistical functionality	Outputs the total size of the instances of the static members for each class.	9.5
Reference-related information output functionality	Outputs the reference relation of the class that has a specified class (instance) as member.	9.6
Pre-statistical garbage collection selection functionality	You can select whether to execute the garbage collection before a class-wise statistical information is output. Use the options to specify this functionality when executing the jheapprof command. In default setting, the garbage collection is executed before a class-wise statistical information is output.	9.7
Unused objects statistical functionality in the Tenured area	Identifies the unused objects in the Tenured area.	9.8
Base object list output functionality for Tenured augmentation factors	Outputs the information about objects acting as the base of the unused objects that are identified using the unused object statistical functionality in the Tenured area.	9.9

Among the above functionalities, an instance statistical functionality, the STATIC member statistical functionality, reference-related information output functionality, and the base object list output functionality for Tenured augmentation factors are enabled when executing the class-wise statistical functionality.

You can set the pre-statistical garbage collection selection functionality when executing the class-wise statistical functionality. Select this functionality as per the purpose of investigating the class-wise statistical information. For details, see 9.7.2 Guidelines for selecting the garbage collection.