The user in this forum question really misses the Allocation Pressure column in the custom stacktrace view in the Memory/Allocations/Allocation in New TLAB tab in JMC 5.x
https://community.oracle.com/message/14756066

The new generic stacktrace in JMC 6.x only has the count column, which can be misleading if one location allocates many but small objects/TLABs, and another location allocates fewer but largers, and the second location is the one that is most interesting because it allocates more in total (aka higher Pressure)

The stacktrace view could be made extendable to include a customizable column, depending on it's input, does not only have to be Allocation Pressure.

Another perhaps simpler option to solve the particular problem for the user is to add a new histogram with the top methods and allocation pressure column on the Memory page.