REM out.
set FESS_JAVA_OPTS=%FESS_JAVA_OPTS% -Xms%FESS_MIN_MEM% -Xmx%FESS_MAX_MEM%
set FESS_JAVA_OPTS=%FESS_JAVA_OPTS% -XX:MaxMetaspaceSize=256m -XX:CompressedClassSpaceSize=32m

REM new generation
if NOT "%FESS_HEAP_NEWSIZE%" == "" (
set FESS_JAVA_OPTS=%FESS_JAVA_OPTS% -Xmn%FESS_HEAP_NEWSIZE%
)

REM max direct memory
if NOT "%FESS_DIRECT_SIZE%" == "" (

# out.
FESS_JAVA_OPTS="$FESS_JAVA_OPTS -Xms${FESS_MIN_MEM}"
FESS_JAVA_OPTS="$FESS_JAVA_OPTS -Xmx${FESS_MAX_MEM}"
FESS_JAVA_OPTS="$FESS_JAVA_OPTS -XX:MaxMetaspaceSize=256m -XX:CompressedClassSpaceSize=32m"

# new generation
if [ "x$FESS_HEAP_NEWSIZE" != "x" ]; then
    FESS_JAVA_OPTS="$FESS_JAVA_OPTS -Xmn${FESS_HEAP_NEWSIZE}"
fi

# set to headless, just in case

-Dhttp.maxConnections=20\n\
-Djava.util.logging.manager=org.apache.logging.log4j.jul.LogManager\n\
-server\n\
-Xms128m\n\
-Xmx512m\n\
-XX:MaxMetaspaceSize=128m\n\
-XX:CompressedClassSpaceSize=32m\n\
-XX:-UseGCOverheadLimit\n\
-XX:+UseTLAB\n\
-XX:+DisableExplicitGC\n\
-XX:-HeapDumpOnOutOfMemoryError\n\
-XX:-OmitStackTraceInFastThrow\n\
-XX:+UnlockExperimentalVMOptions\n\
-XX:+UseG1GC\n\

     * -Djava.util.logging.manager=org.apache.logging.log4j.jul.LogManager<br>
     * -server<br>
     * -Xms128m<br>
     * -Xmx512m<br>
     * -XX:MaxMetaspaceSize=128m<br>
     * -XX:CompressedClassSpaceSize=32m<br>
     * -XX:-UseGCOverheadLimit<br>
     * -XX:+UseTLAB<br>
     * -XX:+DisableExplicitGC<br>
     * -XX:-HeapDumpOnOutOfMemoryError<br>
     * -XX:-OmitStackTraceInFastThrow<br>