[GitHub] [rocketmq] Cczzzz opened a new issue #3748: run on jdk-17 and zgc

[GitBox <gi...@apache.org>]

Cczzzz opened a new issue #3748:
URL: https://github.com/apache/rocketmq/issues/3748


   This is the modified startup script, it has been running normally for 3 months，Time per gc < 1ms
   
   ``` 
   #!/bin/sh
   
   # Licensed to the Apache Software Foundation (ASF) under one or more
   # contributor license agreements.  See the NOTICE file distributed with
   # this work for additional information regarding copyright ownership.
   # The ASF licenses this file to You under the Apache License, Version 2.0
   # (the "License"); you may not use this file except in compliance with
   # the License.  You may obtain a copy of the License at
   #
   #     http://www.apache.org/licenses/LICENSE-2.0
   #
   # Unless required by applicable law or agreed to in writing, software
   # distributed under the License is distributed on an "AS IS" BASIS,
   # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   # See the License for the specific language governing permissions and
   # limitations under the License.
   
   #===========================================================================================
   # Java Environment Setting
   #===========================================================================================
   error_exit ()
   {
       echo "ERROR: $1 !!"
       exit 1
   }
   
   [ ! -e "$JAVA_HOME/bin/java" ] && JAVA_HOME=$HOME/jdk/java
   [ ! -e "$JAVA_HOME/bin/java" ] && JAVA_HOME=/usr/java
   [ ! -e "$JAVA_HOME/bin/java" ] && error_exit "Please set the JAVA_HOME variable in your environment, We need java(x64)!"
   
   export JAVA_HOME
   export JAVA="$JAVA_HOME/bin/java"
   export BASE_DIR=$(dirname $0)/..
   export CLASSPATH=.:${BASE_DIR}/conf:${CLASSPATH}:${BASE_DIR}/lib/*
   
   #===========================================================================================
   # JVM Configuration
   #===========================================================================================
   # The RAMDisk initializing size in MB on Darwin OS for gc-log
   DIR_SIZE_IN_MB=600
   
   choose_gc_log_directory()
   {
       case "`uname`" in
           Darwin)
               if [ ! -d "/Volumes/RAMDisk" ]; then
                   # create ram disk on Darwin systems as gc-log directory
                   DEV=`hdiutil attach -nomount ram://$((2 * 1024 * DIR_SIZE_IN_MB))` > /dev/null
                   diskutil eraseVolume HFS+ RAMDisk ${DEV} > /dev/null
                   echo "Create RAMDisk /Volumes/RAMDisk for gc logging on Darwin OS."
               fi
               GC_LOG_DIR="/Volumes/RAMDisk"
           ;;
           *)
               # check if /dev/shm exists on other systems
               if [ -d "/dev/shm" ]; then
                   GC_LOG_DIR="/dev/shm"
               else
                   GC_LOG_DIR=${BASE_DIR}
               fi
           ;;
       esac
   }
   
   choose_gc_log_directory
   
   JAVA_OPT="${JAVA_OPT} -server -Xms8g -Xmx8g"
   # JAVA_OPT="${JAVA_OPT} -XX:+UseG1GC -XX:G1HeapRegionSize=16m -XX:G1ReservePercent=25 -XX:InitiatingHeapOccupancyPercent=30 -XX:SoftRefLRUPolicyMSPerMB=0"
   # JAVA_OPT="${JAVA_OPT} -verbose:gc -Xloggc:${GC_LOG_DIR}/rmq_broker_gc_%p_%t.log -XX:+PrintGCDetails -XX:+PrintGCDateStamps -XX:+PrintGCApplicationStoppedTime -XX:+PrintAdaptiveSizePolicy"
   # JAVA_OPT="${JAVA_OPT} -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=5 -XX:GCLogFileSize=30m"
   JAVA_OPT="${JAVA_OPT} -XX:ReservedCodeCacheSize=256m -XX:InitialCodeCacheSize=256m "
   JAVA_OPT="${JAVA_OPT} -XX:+UnlockExperimentalVMOptions -XX:+UseZGC "
   JAVA_OPT="${JAVA_OPT} -XX:ConcGCThreads=2 -XX:ParallelGCThreads=6 "
   JAVA_OPT="${JAVA_OPT} -Xlog:safepoint,classhisto*=trace,age*,gc*=info:${GC_LOG_DIR}/rmq_broker_gc_%p_%t.log:time,tid,tags:filecount=5,filesize=50m "
   
   JAVA_OPT="${JAVA_OPT} --add-opens java.base/java.nio=ALL-UNNAMED"
   JAVA_OPT="${JAVA_OPT} --add-opens java.base/java.lang=ALL-UNNAMED"
   JAVA_OPT="${JAVA_OPT} --add-opens java.base/jdk.internal.ref=ALL-UNNAMED"
   
   JAVA_OPT="${JAVA_OPT} -XX:-OmitStackTraceInFastThrow"
   JAVA_OPT="${JAVA_OPT} -XX:+AlwaysPreTouch"
   JAVA_OPT="${JAVA_OPT} -XX:MaxDirectMemorySize=15g"
   JAVA_OPT="${JAVA_OPT} -XX:-UseLargePages"
   # JAVA_OPT="${JAVA_OPT} -Djava.ext.dirs=${JAVA_HOME}/jre/lib/ext:${BASE_DIR}/lib:${JAVA_HOME}/lib/ext"
   #JAVA_OPT="${JAVA_OPT} -Xdebug -Xrunjdwp:transport=dt_socket,address=9555,server=y,suspend=n"
   JAVA_OPT="${JAVA_OPT} ${JAVA_OPT_EXT}"
   JAVA_OPT="${JAVA_OPT} -cp ${CLASSPATH}"
   
   numactl --interleave=all pwd > /dev/null 2>&1
   if [ $? -eq 0 ]
   then
   	if [ -z "$RMQ_NUMA_NODE" ] ; then
   		numactl --interleave=all $JAVA ${JAVA_OPT} $@
   	else
   		numactl --cpunodebind=$RMQ_NUMA_NODE --membind=$RMQ_NUMA_NODE $JAVA ${JAVA_OPT} $@
   	fi
   else
   	$JAVA ${JAVA_OPT} $@
   fi
   
   ```


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[GitHub] [rocketmq] caigy commented on issue #3748: run on jdk-17 and zgc

[GitBox <gi...@apache.org>]

caigy commented on issue #3748:
URL: https://github.com/apache/rocketmq/issues/3748#issuecomment-1030743230


   Could you provide GC time of G1 on JDK17 to show the improvement? Besides, what is the condition to prefer ZGC?


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