I installed Oracle Grid Control 11g months ago and left it with typical configuration. Recently it becomes a little bit unstable and did a quick audit. Here are my first 2 finding but and will do a deeper dive into into if only I will find some more time.
Memory settings
In default configuration of Weblogic Management server running Grid Control instance maximum number of Java stack memory (parameter -Xmx) is unset and it is using default value of 512 MB. It is too small for big installation with many agents and concurrent users. Weblogic configuration allow users to set USER_MEM_ARGS variable with Java memory settings in starting script which will be used instead of MEM_ARGS variable. I has goint to change startManagedWebLogic.sh file as I want to keep default values for admin server but I found better solution on
Oracle Enterprise Manager blog in "
Increasing the JAVA heap size of the OMS" section. Instead of startManagedWebLogic.sh you need to edit startEMServer.sh file
and add following section just before last line
if [ "${SERVER_NAME}" != "EMGC_ADMINSERVER" ] ; then
USER_MEM_ARGS="-Xms256m -Xmx1024m -XX:MaxPermSize=512m -XX:CompileThreshold=8000 -XX:PermSize=128m"
export USER_MEM_ARGS
fi
Log rotation
It was very typical for old Oracle Application Server or Grid Control 10g that logs weren't rotated in default configurations. I have seen this many times when I have been asked to do some troubleshooting. After installation of Grid Control 11g together with Weblogic I was thinking how many logs has been left without rotation this time. Most of them looks OK but I found one
mod_wl_ohs.log belonging to WebTier (Oracle HTTP server) which is still not rotated. This log file is configured in this configuration file mod_wl_ohs.conf and it is quite easy to add rotation to it. As all rotated Apache logs this line
WLLogFile ${ORACLE_INSTANCE}/diagnostics/logs/${COMPONENT_TYPE}/${COMPONENT_NAME}/mod_wl_ohs.log
should be started with
rotatelog command:
WLLogFile "|${ORACLE_HOME}/ohs/bin/rotatelogs ${ORACLE_INSTANCE}/diagnostics/logs/${COMPONENT_TYPE}/${COMPONENT_NAME}/mod_wl_ohs.log 43200"
