OpenSearch/bin/elasticsearch.in.sh

CLASSPATH=$CLASSPATH:$ES_HOME/lib/elasticsearch-@ES_VERSION@.jar:$ES_HOME/lib/*:$ES_HOME/lib/sigar/*

if [ "x$ES_MIN_MEM" = "x" ]; then
    ES_MIN_MEM=256m
fi
if [ "x$ES_MAX_MEM" = "x" ]; then
    ES_MAX_MEM=1g
fi

# Arguments to pass to the JVM
JAVA_OPTS="$JAVA_OPTS -Xms${ES_MIN_MEM}"
JAVA_OPTS="$JAVA_OPTS -Xmx${ES_MAX_MEM}"
JAVA_OPTS="$JAVA_OPTS -Xss128k"

JAVA_OPTS="$JAVA_OPTS -Djline.enabled=true"

# Enable aggressive optimizations in the JVM
JAVA_OPTS="$JAVA_OPTS -XX:+AggressiveOpts"

# Enable reference compression, reducing memory overhead on 64bit JVMs
#    - Disabled by default as it is not stable for Sun JVM before 6u19
#JAVA_OPTS="$JAVA_OPTS -XX:+UseCompressedOops"

JAVA_OPTS="$JAVA_OPTS -XX:+UseParNewGC"
JAVA_OPTS="$JAVA_OPTS -XX:+UseConcMarkSweepGC"
JAVA_OPTS="$JAVA_OPTS -XX:+CMSParallelRemarkEnabled"
JAVA_OPTS="$JAVA_OPTS -XX:SurvivorRatio=8"
JAVA_OPTS="$JAVA_OPTS -XX:MaxTenuringThreshold=1"
JAVA_OPTS="$JAVA_OPTS -XX:CMSInitiatingOccupancyFraction=75"
JAVA_OPTS="$JAVA_OPTS -XX:+UseCMSInitiatingOccupancyOnly"

JAVA_OPTS="$JAVA_OPTS -XX:+HeapDumpOnOutOfMemoryError"
JAVA_OPTS="$JAVA_OPTS -XX:HeapDumpPath=$ES_HOME/work/heap"