How to limit the size of virtual memory dedicated to the JDK 8?

Hello

I use JDK 8 on Solaris on x 64 box 11.1:

Java $-version
Java version "1.8.0_11".
Java (TM) SE Runtime Environment (build 1.8.0_11 - b12)
Java for 64-bit Server VM (build 25.11 - b03, mixed mode)

I am running tomcat/xwiki on top of that. I set myself as a result of operating options to limit the use of memory in Java:

CATALINA_OPTS = "" Server - d64 - Xms1024m-Xmx1024m - XX: MaxMetaspaceSize = 1024 m - XX: MaxPermSize = 196 m-Dfile.encoding = utf - 8 - Djava.awt.headless = true - XX: + UseParallelGC - XX: MaxGCPauseMillis = 100 ' "

These params are from the same time project JDK 7 served so I left - XX: MaxPermSize here even if it is no longer supported and I just added - XX: MaxMetaspaceSize = 1024 m for JDK 8.

My problem is that when I put server under a load to push new sound REST API to the XWiki pages, then I see RSS (in prstat) hovers around 1.5 GB, but the growing SIZE and the entire process to push pages on the server becomes slower and slower.

The problem is that I am not able to detect any obvious memory leak using jconsole or using visual vm and the dump of the heap. They both claims that, all in all, my JDK consumes up to 2 GB of RAM. The only exception is jconsole, in his summary of the VM pane, tells me that the amount of "committed virtual memory:" occupies about 14 GB, which corresponds to the observation of the utility value of SIZE of prstat.

I do not like the idea of JVM consumes more memory with possibility not to stop in this process, I would like to ask if there are any parameter which will allow me to set the memory hard limit can be used by any JVM?

Any idea is appreciated here,

Thank you!

Karel

Just a follow-up. It seems that this probably isn't problem with JDK se. The problem more and more memory is caused by Apache Solr, which uses the memory-mapped file access and this adds to the amount of virtual memory. It also explains why he is not counted in the amount of heap memory.

In any case, some kind of help on this will be appreciated in either visualvm or jconsole. For example jconsole should at least add an indicator to virtual memory committed that it contains also the memory mapped files or something like that.

Thank you!
Karel

Tags: Java

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