Re: Reggie

Per,

  What I normally do is hookup a JVM Profiler to see if there is a =
memory leak.  Most are pretty good at showing you the heap usage and =
whether its growing and not being recovered.  The one I'm most familiar =
with is JProfiler - but that costs money.  But you could have a look at =
VisualVM ( https://visualvm.dev.java.net/index.html ).  In most cases =
the profiler comes with an agent jar that you have to put in either your =
classpath or bootclasspath.  Then you typically have to set a command =
line property to enable the profiler agent.  I took a quick peak at =
VisalVM and it looks like it uses the jstatd that is packaged with JDK =
1.6 =
(http://java.sun.com/javase/6/docs/technotes/tools/share/jstatd.html), =
so with VisualVM you may not have to follow as many steps.  Probably =
just run jstatd on the machine that is Reggie is running on, then =
connect VisualVM to it.  The other option is to just specify -verbose:gc =
in the script that starts up Reggie and watch what verbose:gc has to =
report.  But you won't get as detailed information that you'd get from a =
Profiler.

Hope this helps?



Regards,


Jeff


-----Original Message-----
From: Per Edlund [mailto:[email protected]]
Sent: Wed 5/27/2009 8:17 AM
To: [email protected]
Subject: Reggie
=20
Hi!

We'ev been using Jini for quite som time now but havn't upgraded after =
the
2.1 release. We're currently experiencing some issues with reggie =
choking
the machine and we can't really tell why. The number of jiniservices we =
have
is around 60 (these are client's as well, and on top of this we have
webservers which are clients (around 100-200)) , we use the LookupCache =
etc,
but efery now and then we have to restart the VM running reggie. Doing a
discovery during this time get's no lookup, and services can't be found.

If we look at how services register/unregister, that seam to take an =
aweful
long time when reggie is starting to choke, and out theory is that =
reggie
uses some kind of queue which grows more than it can be processed.

Does any one have an idea on how to dig into this?

Env: Linux Debian, Sun Java 1.5&1.6

Kind regards
/Per

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