DX Application Performance Management

All,

I'm using 9.1.1.

I'm interesting in monitoring the size of my code cache.

There are a couple of ways to approach this.

I would prefer to tweak what shows up under GC Monitor|Memory Pools.  There are 5 MBeans of type MemoryPool in my JVM and 4 of them show up in the Investigator under GC Monitor|Memory Pools.  I just need to make the 5th one show up also but don't know how.

Instead, I can edit the jmx filter to include it somehow.  The value is the "used" element of the "Usage" attribute of java.lang:type=MemoryPool,name=Code Cache.  Usage is a CompositeData object, like java.util.Map, with 4 elements in it.  I want the value for key "used."  I can't figure out the syntax for referencing that value.

I can't find anything like this in the docs, nor could I find where the existing Memory Pool data is configured in the various OOTB pbd files.

thanks

You might be interested in up-voting this idea, here: Java Stack Space and Code Cache Monitoring

and in case you have additional ideas for GC monitor - comment here: What else is missing for GC Monitor

and regards the JMX mess a other idea to possibly vote on New JMX Integration/Framework for Java Agent

I found a decent solution to this problem.  I would prefer to have this data under GC Monitor|Memory Pools like its siblings, but I found the right jmx filter settings to get it to show under JMX.

Enable/uncomment this line in IntroscopeAgent.profile:

introscope.agent.jmx.compositedata.enable=true

Make sure your jmx keys include "type, name."  This is mine:

introscope.agent.jmx.name.primarykeys=Type,Name,type,name

Add the mbean to your jmx filter:

MemoryPool|Code Cache:Usage

If you want all 5 pools under JMX, you can probably use this instead (I haven't tried it:)

MemoryPool|*:Usage

After a restart, you get output like this:

The ones with parens are the actual CompositeData values I'm interested in.  The other 2 are just attributes of Code Cache that happen to begin with "Usage."