Hello,

I have a Jenkins instance running ~1000 jobs on ~30 agents.  Recently I have 
been having problems with high memory usage and slow loading times, I took a 
heap dump this morning and when I loaded it into a memory analyser it showed a 
single object taking up 5GB of space - the total used is only 6GB.  The culprit 
is a ConcurrentHashMap in RemoteInvocationHandler.Unexporter.  Is this expected 
behaviour for that class, is it a bug, or am I doing something inadvisable?  Is 
this the likely cause of my loading time problems, or do I need to keep 
investigating?

The server is running version 2.7.1 on Debian 3.2.81-1 with java version 
1.7.0_101, 64-bit. Agents are primarily Windows 8 and 10 with a couple on 7.  I 
am running with the following java options:
-Dgroovy.use.classvalue=true
-Djava.awt.headless=true
-XX:MaxPermSize=512m
-Xmx8192m
-XX:+HeapDumpOnOutOfMemoryError
-Dhudson.model.DirectoryBrowserSupport.CSP=sandbox allow-scripts; default-src 
'self'; img-src 'self'; style-src 'self' 'unsafe-inline'; script-src 'self' 
'unsafe-inline';
-Dcom.sun.management.jmxremote.port=
-XX:+PrintGCDetails
-XX:+PrintGCTimeStamps
-Dcom.sun.management.jmxremote.password.file=


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