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Why are my Jetty servers eating up so much swap memory?

 
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Greetings to all,

In my environment (Solaris) I host applications for several clients and each application runs on each own Jetty server instance. I'm doing this to isolate each customer such that when one Jetty goes down only one customer is affected. The problem I have is that these Jetty servers are eating up a great deal of swap memory, some of them up to 410MB. I need to reduce this memory footprint but I'm not sure how to do it. My apps are Spring/Hibernate based. Each application has jars in WEB-INF/lib totaling 32MB. Any suggestions?

Thanks in advance.
 
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Dear Ernest,

How much memory are you Jetty servers configured to use? Check the java command line arguments. Probably there is something like -Xmx in there.

The short version is: make a memory dump and analyse that with a memory profiler.
Kees Jan
 
ernest fakudze
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Thanks Kees, I will experiment with the heap minimum and maximum sizes. They are currently not set.
 
Kees Jan Koster
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You can also install Java-monitor to get a view of your memory use over time. Here is a demo of what that might look like: http://java-monitor.com/livedemo.html
 
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