openjms server outofMemory

Hello
     My openjms server enviroment:RedHat7.0 
,openjms7.6(rmi,localhost,oracle9i),It runs well ,but server prints 
outofMemory every 48 hours,so we must restart it.I think it is caused by 
gc? any help is appricated!
  setenv.sh璁剧疆濡涓:
  JAVA_OPTS=-Xmx512m
 openjms.xml稿抽缃涓: 
<DatabaseConfiguration>
         <RdbmsDatabaseConfiguration
                driver="oracle.jdbc.driver.OracleDriver" 
                url="jdbc:oracle:thin:@hs-bossdb:1521:hsboss" 
                user="bossv2_jms" 
                password="bossv2jms2hurray"
                maxActive="10"
                maxIdle="5"
                evictionInterval="3600"
                testQuery="select sysdate from dual"/>
 </DatabaseConfiguration>
 <GarbageCollectionConfiguration memoryCheckInterval="10"
                                  lowWaterThreshold="35"
                                  garbageCollectionInterval="400"
                                  garbageCollectionThreadPriority="5"/>

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