Marcus is the project lead for the Open JDK JMC project. Once upon a time he co-founded Appeal, the company creating the JRockit JVM.
I’ve gotten a lot of questions about continuous production profiling lately. Why would anyone want to profile in production, or, if production profiling seems reasonable, why the heck leave it on continuously?
I thought I’d take a few moments and share my take on the problem and the success I’ve seen the past years applying continuous production profiling in systems in the real world.
Profiling these days is no longer limited to high overhead development profilers. The capabilities of the production time profilers are steadily increasing and their value is becoming less controversial, some preferring them for complex applications even during development.Marcus Hirt
Since JDK 14, there is a new kid on the block – Java Flight Recorder streaming, which enables developers to subscribe to JFR data.
It is a feature allowing a developer to subscribe to select JFR data and to decide what to do with that data in the host process. JFR events can also be consumed from a separate process by pointing to the file repo of a separate JVM process – the mechanism is the same.Marcus Hirt
OpenJDK, being open sourced, has builds provided by plenty of vendors. Here is a non-exhaustive list of some vendors shipping supported versions of OpenJDK (in alphabetical order, distribution(s) in parenthesis):
– Alibaba (Dragonwell)
– Amazon (Corretto)
– Azul (Zulu, Zing)
– BellSoft (Liberica)
– Red Hat (Red Hat Builds of OpenJDK)
– Oracle (Oracle JDK, Oracle OpenJDK)
– SAP (SapMachine)Marcus Hirt