closes #414: adapts java args for docker-compose

[ivansenic]

What this PR does:
Fixes memory java args in the docker-compose files:

• remove low new heap size for the dse
• set reasonable heap maximum sizes for all JVMs on a 2G container mem limit

After updates:

DSE

-XX:+AlwaysPreTouch -XX:CICompilerCount=4 -XX:CompileCommandFile=/opt/dse/resources/cassandra/conf/hotspot_compiler -XX:ConcGCThreads=3 -XX:+DebugNonSafepoints -XX:G1HeapRegionSize=1048576 -XX:G1RSetUpdatingPauseTimePercent=5 -XX:GCLogFileSize=10485760 -XX:GuaranteedSafepointInterval=300000 -XX:+HeapDumpOnOutOfMemoryError -XX:InitialHeapSize=1610612736 -XX:+ManagementServer -XX:MarkStackSize=4194304 -XX:MaxDirectMemorySize=15892217856 -XX:MaxGCPauseMillis=500 -XX:MaxHeapSize=1610612736 -XX:MaxNewSize=965738496 -XX:MinHeapDeltaBytes=1048576 -XX:NumberOfGCLogFiles=10 -XX:OnOutOfMemoryError=kill -9 %p -XX:+ParallelRefProcEnabled -XX:+PrintGC -XX:+PrintGCApplicationStoppedTime -XX:+PrintGCDateStamps -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -XX:+PrintHeapAtGC -XX:+PrintPromotionFailure -XX:+PrintTenuringDistribution -XX:+ResizeTLAB -XX:-RestrictContended -XX:StringTableSize=1000003 -XX:ThreadPriorityPolicy=42 -XX:ThreadStackSize=256 -XX:+UnlockDiagnosticVMOptions -XX:-UseBiasedLocking -XX:+UseCompressedClassPointers -XX:+UseCompressedOops -XX:+UseG1GC -XX:+UseGCLogFileRotation -XX:-UseNUMA -XX:+UseTLAB -XX:+UseThreadPriorities

Coordinator

java -server -Xmx1536M -Dcassandra.libjemalloc=/usr/lib/x86_64-linux-gnu/libjemalloc.so.2 -Dstargate.libdir=./stargate-lib -Djava.awt.headless=true -jar ./stargate-lib/stargate-starter-2.0.12.jar --cluster-name dse-6.8.34-cluster --cluster-version 6.8 --listen 192.168.48.2 --dc dc1 --rack rack1 --dse --enable-auth --developer-mode

JSON API

-Dquarkus.http.host=0.0.0.0 -Djava.util.logging.manager=org.jboss.logmanager.LogManager -Xms768m -Xmx1536m -XX:+UseG1GC -XX:MinHeapFreeRatio=10 -XX:MaxHeapFreeRatio=20 -XX:GCTimeRatio=4 -XX:AdaptiveSizePolicyWeight=90 -XX:+ExitOnOutOfMemoryError

Which issue(s) this PR fixes:
Fixes #414

[maheshrajamani]

@ivansenic Why the max memory needs to be reduced to 1.5G?

[ivansenic]

@ivansenic Why the max memory needs to be reduced to 1.5G?

@maheshrajamani container limits are at 2G, the heap needs to be smaller so there is enough space for non-heap memory regions..