I want to figure out why JVM heap usage on Elasticsearch node is staying consistently above 80%. In order to do this, I take a heap dump by running
jmap.exe -heap:format=b 5348
(5348 is the Process ID). Then I can analyze the dump with VisualVM.
The problem is that jmap pauses the JVM while taking the dump, so the node is basically offline for around 5 minutes.
This article suggests a faster approach that relies on taking coredump with gdb on Linux. I already tried WinDbg, which created a core dump, but I couldn't use it in VisualVM.
Is there a similar approach for Windows? How one can take heap dumps in seconds, not minutes?