In order to determine liveness, Java has to run full GC, so yes, it does. To put the question to sleep… here is the answer, if anyone needs to dig deeper. Feel free. part of /hotspot/agent/src/share/vm/services/attachListener.cpp taken from openjdk http://download.java.net/openjdk/jdk7/ and you must accept http://www.gnu.org/licenses/gpl-2.0.html // Implementation of “inspectheap” command // // Input arguments :- … Read more
You’ll find the complete list documented under Class.getName(): If this class object represents a reference type that is not an array type then the binary name of the class is returned, as specified by the Java™ Language Specification, Second Edition. If this class object represents a primitive type or void, then the name returned is … Read more
[C is a char[] [S is a short[] [I is a int[] [B is a byte[] [[I is a int[][] The JavaDoc for Class.getName() has the details.
You should use jmap -heap:format=b <process-id> without any paths. So it creates a *.bin file which you can open with jvisualvm.exe (same path as jmap). It’s a great tool to open such dump files.
The best thing out there is Memory Analyzer (MAT), IntelliJ does not have any bundled heap dump analyzer.
Since JDK 7 you can use the JDK command tool ‘jcmd’ such as: jcmd <pid> GC.run