The Java GC logs are one of the places where we can start debugging an application in the event of a performance issue. The GC logs provide important information, such as:

The last time the GC ran

The number of GC cycles run

The interval at which the GC ran

The amount of memory freed up after the GC ran

The time the GC took to run

The amount of time for which the JVM paused when the garbage collector ran

The amount of memory allocated to each generation