Alexey Ragozin questions

Alexey Ragozin answers

• How can I analyse large size heap dump around of 35-40 GB
• Java: does GarbageCollectorMBean.getCollectionTime return pause time or something else?
• what are "live" objects in java heap? (heap dump with jmap)
• How to identify Tenured Space
• JVM Memory Tuning Advice
• Why promotion failure and concurrent mode failure?
• Java: New Generation Used 100%, Eden Space Used 100%, From Space Used 100%
• Java: G1 Old generation garbage collection count is 0
• permgen garbage collection takes multiple Full GC
• G1 GC - Large background I/O causing JVM unresponsive - a 8sec pause