How does Java run on your OpenVMS system?

« Back to Previous Page
0
0

Does Java seem slow on OpenVMS? How do you run your Java applications?

Posted by kbarnes (Questions: 5, Answers: 18)
Asked on May 17, 2018 10:04 am
91 views
0

I think a lot of 3GL developers try to run Java like they do a batch job with an executable. This is a problem because Java uses the JVM to interpret the byte code in the class file. If you try to launch the JVM every time you want to run the Java program, it will seem slow. They need to convert to a client-server model where the Java server stays up and waits for an RMI from the client.

Posted by mark.kerr (Questions: 0, Answers: 3)
Answered on May 24, 2018 10:17 am
0

Hi Brad, Sorry, we are not seeing slowness – our tools run in Java and it is very fast. After hearing reports from users during our recent Modernization class that they don’t use Java because it is slow, I was trying to find out if the perception of Java being slow is pervasive in the community and get more information of how it is used. I guess I was targeting the current OpenVMS OSes (8.3, 8.4+) and either Java 1.6 or 1.8 instead of 1.5 since it is too old. Also, Brett Cameron said recently that the 1.8 port was about the same speed as 1.6, so I don’t think that makes a difference. I am not sure if OS version is significant either; I suspect it (Java) is being used incorrectly (called like a 3GL language).

Posted by kbarnes (Questions: 5, Answers: 18)
Answered on May 17, 2018 2:10 pm

Your question does bring up something I had not considered: is Java heavily used on Alphas and older versions of OpenVMS?

(kbarnes at May 17, 2018 2:20 pm)
1

Kevin – If ever there was a question where the version of VMS, Java and the architecture matters, it’s this one. What versions are you seeing slowness with?

Posted by Brad McCusker (Questions: 0, Answers: 1)
Answered on May 17, 2018 11:21 am
« Back to Previous Page