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Yea, I've seen the DNS lookup issue as well. Happens when the JVM is starting up. It is more than a couple seconds though.

Mark Murphy
Atlas Data Systems

-----David Gibbs <david@xxxxxxxxxxxx> wrote: -----
To: Java Programming on and around the IBM i <java400-l@xxxxxxxxxxxx>
From: David Gibbs <david@xxxxxxxxxxxx>
Date: 12/30/2016 12:32PM
Subject: Re: java performance in batch of a packaged tool

On 12/29/16 4:15 PM, D*B wrote:
... some people are not knowing, what they are talking about:
couple of seconds, that is neither the java version (32 or 64 bit), nor
IPV6, nor DNS possibilities (whatever this shoukld be) and you don't
need any "commercial stuff", that's startup of the JVM - and this could
be very easily avoided, only using open source stuff, proven in hundreds
of installations...

Um, yeah, it could very well be a DNS lookup issue. I've encountered
this before. Surprised me after figuring out what the problem was. I
had to write many test programs to narrow the issue down.

I'm not saying that the OP's issue is definitely a DNS lookup issue ...
but it could be or at least it could be contributing to the performance


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