This is essentially what is happening. It is called once from a simple CL program using the 'Java' command, and runs all day communicating via data queues with RPG programs.

I just don't understand why the AS400 is so slow to startup, when a PC can do it in a fraction of the time.


-----Original Message-----
From: JAVA400-L <java400-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of David Gibbs via JAVA400-L
Sent: 18 March 2019 16:44
To: Java Programming on and around the IBM i <java400-l@xxxxxxxxxxxxxxxxxx>
Cc: David Gibbs <david@xxxxxxxxxxxx>
Subject: Re: Java startup performance

On 3/18/2019 11:36 AM, Duncan McManus wrote:
How can I improve the startup performance of Java applications on the

How is it being loaded? Invoked by a user? Called from RPG? Called from Java?

My recommendation would be to engineer the application to run as a server and take requests, and send results, via a data queue.

Then the Java code is running all the time and can be activated by anything that can send a data queue entry.

You will experience the startup penalty once and then the code is active.


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