The heap usage is 92%.

#Alert from OEM.

 Target type=Oracle WebLogic Server

Target name=/EMGC_GCDomain/GCDomain/EMGC_OMS1

Categories=Capacity

Message=The heap usage is 92%.

Severity=Critical

Event Type=Metric Alert

Event name=jvm:heapUsedPercentage.value

Metric Group=JVM Metrics

Metric=Heap Usage (%)

Metric value=92

Key Value=

Rule Name=Incident management rule set for all DBA related targets,Create incident for critical metric alerts

Rule Owner=SYSMAN

Update Details:

The heap usage is 92%.



#Solution.

1. Stop OMS
$OMS_HOME/bin>./emctl stop oms -all -force

 2. Have a backup of $EM_INSTANCE_BASE/gc_inst/user_projects/domains/GCDomain/bin/startEMServer.sh file

Update the following section:
From



USER_MEM_ARGS="-Xms256M -Xmx1740M -XX:PermSize=128M -XX:MaxPermSize=1024M"

if [ "${JAVA_VENDOR}" = "Sun" ] ; then

  if [ "${PRODUCTION_MODE}" = "" ] ; then

  USER_MEM_ARGS="-Xms256M -Xmx1740M -XX:PermSize=128M -XX:MaxPermSize=1024M -XX:CompileThreshold=8000 -XX:-DoEscapeAnalysis -XX:+UseCodeCacheFlushing -

XX:ReservedCodeCacheSize=100M -XX:+UseConcMarkSweepGC -XX:+UseParNewGC -XX:+CMSClassUnloadingEnabled"



TO



USER_MEM_ARGS="-Xms256M -Xmx4096M -XX:PermSize=128M -XX:MaxPermSize=1024M"

if [ "${JAVA_VENDOR}" = "Sun" ] ; then

  if [ "${PRODUCTION_MODE}" = "" ] ; then

  USER_MEM_ARGS="-Xms256M -Xmx4096M -XX:PermSize=128M -XX:MaxPermSize=1024M -XX:CompileThreshold=8000 -XX:-DoEscapeAnalysis -XX:+UseCodeCacheFlushing -

XX:ReservedCodeCacheSize=100M -XX:+UseConcMarkSweepGC -XX:+UseParNewGC -XX:+CMSClassUnloadingEnabled"


Note that we have Replaced Xmx value of 1740 to 4096 in 2 places above. if issue still persist then increse the values to next optimal value.

3. Start OMS
$OMS_HOME/bin>./emctl start oms

 #Reference.


EM 13C : Heap usage Warning or Critical Alerts for EMGC_ADMINSERVER Target (Doc ID 2320739.1)