Heapdump / Javacore / GarbageCollector analysis

Memory Analyzer https://www.eclipse.org/mat/

For IBM Java

Hang threads in Java Platform, Enterprise Edition applications (https://www.ibm.com/support/knowledgecenter/en/SSEQTP_9.0.5/com.ibm.websphere.base.doc/ae/ctrb_hangdetection.html)

SystemOut.log example

WSVR0605W: Thread threadname has been active for
hangtime and may be hung.  There are totalthreads threads in total in the server that may be hung.

Where threadname is the name that appears in the JVM thread dump, hangtime is the approximate elapsed time since the thread was activated, and totalthreads is the overall rating of the system thread.

IBM Heap Analyzer https://www.ibm.com/support/pages/ibm-heapanalyzer

IBM Thread and Monitor Dump Analyzer for Java (TMDA) https://www.ibm.com/support/pages/ibm-thread-and-monitor-dump-analyzer-java-tmda

IBM Pattern Modeling and Analysis Tool for Java Garbage Collector (PMAT) https://www.ibm.com/support/pages/ibm-pattern-modeling-and-analysis-tool-java-garbage-collector-pmat

Check when GC is occurring + standard output, etc.


Improved Java development performance! Part 3 Let's take a heap dump

How to check OutOfMemoryError

How do I analyze a hprof file

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Heapdump / Javacore / GarbageCollector analysis