tomcat - PS Perm Gen && Perm Gen JVM PROPERTIES? -

i need information:

i have 2 redhat 6.1 linux server tomcat 7.0.28 , java jdk1.7.0_05

on 192.168.1.20(tom04) have 1 instance tomcat 7 mbean "java.lang:type=memorypool,name=perm gen"

on 192.168.1.21(tom01) have 1 instance tomcat 7 mbean "java.lang:type=memorypool,name=ps perm gen"

why mbean not same "perm gen && ps perm gen" mean? ( want ps perm gen everywhere )

http://img27.imageshack.us/img27/5803/tom01u.png

http://img839.imageshack.us/img839/7539/tom04.png

java version same: java -version java version "1.7.0_05" java(tm) se runtime environment (build 1.7.0_05-b06)

setnenv.sh 192.168.1.20(tom04):

!/bin/bash

ld_library_path=$ld_library_path:$catalina_home/lib export ld_library_path

export java_home=/usr/java/default

java_opts="$java_opts -xmx1024m -xms512m -xmn384m -server -xx:maxpermsize=384m" java_opts="$java_opts -dlog_root_path=/opt/applogs/instance01" java_opts="$java_opts -dcom.ogige.environment=production" java_opts="$java_opts -xx:+heapdumponoutofmemoryerror" java_opts="$java_opts -xx:heapdumppath=/opt/applogs" java_opts="$java_opts -xx:parallelgcthreads=2" java_opts="$java_opts -xx:survivorratio=8"

export java_opts=$java_opts

setenv.sh 192.168.1.21(tom01):

!/bin/bash

ld_library_path=$ld_library_path:$catalina_home/lib export ld_library_path

export java_home=/usr/java/default

java_opts="$java_opts -xmx1024m -xms512m -xmn384m -server -xx:maxpermsize=384m" java_opts="$java_opts -dlog_root_path=/opt/applogs/instance01" java_opts="$java_opts -dcom.ogige.environment=production" java_opts="$java_opts -xx:+heapdumponoutofmemoryerror" java_opts="$java_opts -xx:heapdumppath=/opt/applogs" java_opts="$java_opts -xx:parallelgcthreads=2" java_opts="$java_opts -xx:survivorratio=8"

export java_opts=$java_opts

ps = parallel scavenge

i don't know why have not same on 2 host anyway... want have instance ps xxxx add in setenv.sh ( java_opts="$java_opts -xx:+useparallelgc" )