Java-options, What is the difference between the parameters xms and ms

Hi,
I have a problem with deploy bpel process , I get an error "java.lang.OutOfMemoryError: PermGen Space" several sources of information tells me that I have to change some parameters in the file "<ORACLE_HOME> / opmn / conf / opmn.xml" but I doubt some of the parameters, what is the difference between Xms and ms?
And what is the value of the parameter MaxPermSize, which I must also change.
Thanks
Gustavo

Did you ever find out what the difference between the two parameters were!? I have the same questions. Default for opmn.xml = "-server -XX:MaxPermSize=128M -ms512M -mx1024M ...." In attempting to maximize performance and accessible memory, Oracle docs identify adding/modifying "-server -Xmn1228m -XX:+AggressiveHeap -Xms2048m -Xmx2048m -XX:MaxPermSize=128M -ms2048M -mx2048M...." But I question if Xms and ms are really the same parameter or not?
Thanks in advance...
Steve

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Java-options, What is the difference between the parameters xms and ms

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