Joakim Nordström

JVM sustaining engineer at Oracle, with a soft spot for Amiga. Anything resembling my own opinion is my own opinion. he/him

[Java @java]

#JavaOne is back and registration is open NOW! But what can you expect at the upcoming event?

@Sharat_Chander shares the details. https://t.co/e3C6a0SPQ7

[Erik Gahlin @ErikGahlin]

JDK 23 is out!

If you have ever wondered what the correct syntax is for JFR command line options, you can now find out by running the new help option:

$ java -XX:StartFlightRecording:help

[Jfokus @Jfokus]

@matkar and Joakim Nordström @jaokim2001 talked about the Java Dumpster and how it can help you discover the trouble shooting tools in the #JDK.

More info and registration here: https://t.co/zCF7ASfVX3

[Joakim Nordström @jaokim2001]

Registration is at the Jfokus site: https://t.co/QCfAyzz243

[Joakim Nordström @jaokim2001]

I have a workshop on JFR, the JVM, and all things related, in Stockholm, Sweden, scheduled for end of May, at the Jfokus Training Camp.
What's it about, and how to register in🧵
https://t.co/N7WMr0zJOl

[Joakim Nordström @jaokim2001]

After the workshop you'll know which tools are available in the JDK, and how you can maintain and troubleshoot your JVM applications.
The workshop is arranged by Jfokus, and takes place May 28th, in Stockholm, Sweden.
https://t.co/QCfAyzz243

[Joakim Nordström @jaokim2001]

@bs_madhu What is the problem you want to solve, maybe there's another way?

[Joakim Nordström @jaokim2001]

@bs_madhu Hi Madhu! Like you've found, there's only the Socket read/write events, no connection event. Also, the read/write, like many other of the events are (by default) only committed if it takes longer than 20 ms. The obious usecase here is to find slow connections.

[Erik Gahlin @ErikGahlin]

New view command added to JFR!

Read about it here:
https://t.co/gdHBYPmPUS

[Jfokus @Jfokus]

Programmer's Guide to JDK Flight Recorder by Joakim Nordström @jaokim2001 recorded at #Jfokus 2023 https://t.co/I4rY0inWCF

[Jfokus @Jfokus]

If you are in Stockholm tomorrow, join Jforum Meetup to hear what's new in JDK 20 at the Oracle Stockholm office. Register here: https://t.co/Y9Vxesf4vW

[Erik Gahlin @ErikGahlin]

JDK 20 is out!

Two new native memory tracking events!

$ java -XX:NativeMemoryTracking=summary -XX:StartFlightRecording ...

jdk.NativeMemoryUsage {
startTime = 06:01:20.529 (2023-03-21)
type = "GC"
reserved = 129.3 MB
committed = 51.6 MB
}

[Joakim Nordström @jaokim2001]

If you missed my talk at #jfokus, a programmer's guide to JFR, the video is live now: https://t.co/bGDMrNm2xO The talk covers how to work with recordings, create your own events, remotely stream JFR data, and use JFR in unit-tests. #java

[Joakim Nordström @jaokim2001]

@Microsoft Microsoft Extended Basic on a Dragon 32.

[Joakim Nordström @jaokim2001]

@milendyankov “No Country for Old Code”? Maybe doesn’t tie in with what the talk is about?

[Joakim Nordström @jaokim2001]

@brunoborges At first there was mansplaining, then came aisplaining.

[Joakim Nordström @jaokim2001]

@maciejwalkowiak JDK Flight Recorder? It’s available in the JDK, so no need to dl anything. Designed to be lightweight. You can create custom events, and can either analyse recordings with JMC, or create your own consumer using the API.

https://t.co/Pw6JZoAMDB