怎么Elasticsearch尝试修改-Xms -Xmx20G还是16G降低和增加900M都不动？[阿里云检索分析服务 Elasticsearch版]

怎么Elasticsearch尝试修改-Xms -Xmx20G还是16G降低和增加900M都不动？
/usr/jdk64/jdk1.8.0_112/bin/java -Xms31g -Xmx31g -XX:+UseConcMarkSweepGC -XX:CMSInitiatingOccupancyFraction=75 -XX:+UseCMSInitiatingOccupancyOnly -Des.networkaddress.cache.ttl=60 -Des.networkaddress.cache.negative.ttl=10 -XX:+AlwaysPreTouch -Xss1m -Djava.awt.headless=true -Dfile.encoding=UTF-8 -Djna.nosys=true -XX:-OmitStackTraceInFastThrow -Dio.netty.noUnsafe=true -Dio.netty.noKeySetOptimization=true -Dio.netty.recycler.maxCapacityPerThread=0 -Dlog4j.shutdownHookEnabled=false -Dlog4j2.disable.jmx=true -Djava.io.tmpdir=/tmp/elasticsearch-1060148110909776643 -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=data -XX:ErrorFile=logs/hs_err_pid%p.log -XX:+PrintGCDetails -XX:+PrintGCDateStamps -XX:+PrintTenuringDistribution -XX:+PrintGCApplicationStoppedTime -Xloggc:logs/gc.log -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=32 -XX:GCLogFileSize=64m -Des.path.home=/usr/hdp/current/elasticsearch_client -Des.path.conf=/usr/hdp/current/elasticsearch_client/config -Des.distribution.flavor=default -Des.distribution.type=tar -cp /usr/hdp/current/elasticsearch_client/lib/* org.elasticsearch.bootstrap.Elasticsearch -p /usr/hdp/current/elasticsearch_client/elasticsearch.pid