add flags for GC tuning and logging

application/src/main/conf/thingsboard.conf

@@ -15,6 +15,11 @@
 #
 
 export JAVA_OPTS="$JAVA_OPTS -Dplatform=@pkg.platform@ -Dinstall.data_dir=@pkg.installFolder@/data"
+export JAVA_OPTS="$JAVA_OPTS -Xloggc:@pkg.logFolder@/gc.log -XX:+HeapDumpOnOutOfMemoryError -XX:+PrintGCDetails -XX:+PrintGCDateStamps"
+export JAVA_OPTS="$JAVA_OPTS -XX:+PrintHeapAtGC -XX:+PrintTenuringDistribution -XX:+PrintGCApplicationStoppedTime -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=10"
+export JAVA_OPTS="$JAVA_OPTS -XX:GCLogFileSize=10M -XX:-UseBiasedLocking -XX:+UseTLAB -XX:+ResizeTLAB -XX:+PerfDisableSharedMem -XX:+UseCondCardMark"
+export JAVA_OPTS="$JAVA_OPTS -XX:CMSWaitDuration=10000 -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:+CMSParallelRemarkEnabled -XX:+CMSParallelInitialMarkEnabled"
+export JAVA_OPTS="$JAVA_OPTS -XX:+CMSEdenChunksRecordAlways -XX:CMSInitiatingOccupancyFraction=75 -XX:+UseCMSInitiatingOccupancyOnly"
 export LOG_FILENAME=${pkg.name}.out
 export LOADER_PATH=${pkg.installFolder}/conf,${pkg.installFolder}/extensions
 export SQL_DATA_FOLDER=${pkg.installFolder}/data/sql