JVM - GC

 

Application throughput : Time taken to run the application

Major GC run : The number of times the GC run old gen (tenured) space

Minor GC run : The number of times the GC run young gen space

Heap : System allocated memory for JVM to run all applications

Old gen : The space that contains objects which survived multiple GC runs

Young GC: The space that contains objects which are new/short lived (not survived enuf GC runs)

Metaspace: The space that contains the application metadata (classes + methods). Is not part of Heap

Code cache: Cache that contains code which helps JIT compiler

It starts in the young generation (which itself is divided into multiple spaces - Eden and Survivor) and would eventually end up in the tenured generation if it survived long enough.