2 Replies Latest reply: Jun 21, 2012 1:12 PM by Loc Nhan -Oracle RSS

    Questions on the Hardware requirement mention in the 12c installation guide

    user13270875
      Hello experts,

      I have a confusion on the Hardware requirements mentioned in the 12c installation guide where they mentioned as below.

      RAM with ADP1, JVMD2 8 GB 12 GB 20 GB
      1 ADP Manager is Application Dependency and Performance
      2 JVMD is JVM Diagnostics

      Question 1: what does this RAM with ADP or JVMD mean. is it just the additional RAM space required in the server or does is that special requirement ??

      Oracle WebLogic Server JVM Heap 1.7 GB 4 GB 8 GB
      Size

      Question 2: What is this JVM Heap size ? how do we configure this in the server ??

      Thanks in Advance for your Help.
        • 1. Re: Questions on the Hardware requirement mention in the 12c installation guide
          mnazim-Oracle
          Yes this is additional RAM requirement. Please take a look at the doc http://docs.oracle.com/cd/E24628_01/install.121/e24089/adp_installation.htm#EMADV189
          • 2. Re: Questions on the Hardware requirement mention in the 12c installation guide
            Loc Nhan -Oracle
            Hi,

            #1: It means if you also want to install ADP and JVMD, the total RAM required is a small (e.g. < 1000 targets), medium (e.g. > 1000 targets and < 10000 targets), large EM deployment (e.g. > 10000 targets) is 8 GB, 12 GB, 20 GB, respectively. That is the memory requirement for an OMS host.

            #2: The heap size for the OMS java process. You can adjust the heap size by changing the -Xmx<heapsize> (see an example below) in the following file:
            <middleware_home>/gc_inst/user_projects/domains/GCDomain/bin/startEMServer.sh

            An example of OMS heap size setting of 2048 MB:

            if [ "${SERVER_NAME}" != "EMGC_ADMINSERVER" ] ; then
            USER_MEM_ARGS="-Xms256m -Xmx1740m -XX:MaxPermSize=768M -XX:-DoEscapeAnalysis -XX:+UseCodeCacheFlushing"
            if [ "${JAVA_VENDOR}" = "Sun" ] ; then
            if [ "${PRODUCTION_MODE}" = "" ] ; then
            USER_MEM_ARGS="-Xms256m -Xmx2048m -XX:MaxPermSize=768M -XX:-DoEscapeAnalysis -XX:+UseCodeCacheFlushing -XX:+UseConcMarkSweepGC -XX:+UseParNewGC -XX:+CMSClassUnloadingEnabled -XX:CompileThreshold=8000 -XX:PermSize=128m"

            Regards,
            - Loc