Rob Thanks discarding old builds seems to have done it. 

On Wednesday, October 3, 2012 12:51:23 PM UTC-4, Mandeville, Rob wrote:
>
>  How many runs of these builds do you have hanging around?  I had this 
> problem before, and it appeared that the results of every build (except for 
> the log files and the artifacts) are held in memory.  In my case, I stored 
> the environment of every build I ran and our environments get really big 
> (as in, classpaths get truncated for exceeding Linux’s max size for 
> environment variable values).  Trimming down to (say) the last week of 
> builds helped out a lot.
>
>  
>
> Also, you may want to explicitly set your max heap space, but that’s more 
> a Java 7 thing than a Jenkins thing. 
>
>  
>
> --Rob
>
>  
>
> *From:* jenkins...@googlegroups.com <javascript:> [mailto:
> jenkins...@googlegroups.com <javascript:>] *On Behalf Of *Ben Erridge
> *Sent:* Wednesday, October 03, 2012 11:34 AM
> *To:* jenkins...@googlegroups.com <javascript:>
> *Subject:* Jenkins using massive amount of ram
>
>  
>
> I have installed jenkins on a fedora core 17 linux server. When I start 
> jenkins it seems to take a ton of ram (12GB+). I start jenkins with the 
> command.
>  
>  
>  
> I am using open jdk 1.7
>  
>  
>  
> start command is
>  
> /usr/bin/java -Djava.awt.headless=true -DXmx4g -XX:MaxPermSize=128m 
>  -DJENKINS_HOME=/var/lib/jenkins -jar /usr/lib/jenkins/jenkins.war 
> --logfile=/var/log/jenkins/jenkins.log --webroot=/var/cache/jenkins/war 
> --httpPort=8080 --ajp13Port=8009 --debug=5 --handlerCountMax=100 
> --handlerCountMaxIdle=20
>   
>  
>  
> It doesn't seem reasonable to me. Maybe I am doing something wrong? I only 
> have 5 builds setup...
>  
>  
>  
>
> <https://lh5.googleusercontent.com/-Ofheh_L4EgY/UGxasgpqtcI/AAAAAAAAA2Q/V38CC-q1Jvo/s1600/jenkinsTop.png>
>
>  
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