Java Memory Management Performance Analysis

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Internal

Old Generation Analysis

Old generation occupancy after full collections. This is the primary indicator of memory leaks.

gc event-type:FULL_COLLECTION -o old-after, old-capacity, heap-capacity ./gc.log  > gc.csv

Garbage Collection Time Analysis

Full collection frequency, time and CPU usage:

gc event-type:FULL_COLLECTION -o collection-time ./gc.log > full-collection-time.csv

New generation collection frequency, time, and CPU usage:

gc event-type:YOUNG_GENERATION_COLLECTION -o collection-time ./gc.log  > new-generation-collection-time.csv

Leak Analysis

YourKit Memory Snapshot Comparison