JVM

Tips and snippets for Java and the JVM: debugging, tooling, performance, and runtime tuning.

JVM DebuggingEnable verbose network/TLS debugging with -Djavax.net.debug.

Thread dumpCapture a thread dump with jcmd, jstack, or kill -3.

GC tuningPick a GC on JDK 21+ and read the logs before reaching for flags.