Set jvm parameters for tomcat, zookeeper, activeMQ, and Kafka, and set zookeeperactivemq

Set jvm parameters for tomcat, zookeeper, activeMQ, and Kafka, and set zookeeperactivemq
1. Set jvm parameters for tomcatSetting method:
Add configuration in the tomcat bin directory:Setenv. sh

#add tomcat pidCATALINA_PID="$CATALINA_BASE/conf/tomcat.pid"#add java optsJAVA_OPTS=" -Djava.awt.headless=true -Djava.net.preferIPv4Stack=true \  -server -Xmx1g -Xms1g -Xmn256m -XX:PermSize=128m -Xss256k -XX:+DisableExplicitGC \  -XX:+UseConcMarkSweepGC -XX:+CMSParallelRemarkEnabled -XX:+UseCMSCompactAtFullCollection \  -XX:LargePageSizeInBytes=128m -XX:+UseFastAccessorMethods -XX:+UseCMSInitiatingOccupancyOnly \  -XX:CMSInitiatingOccupancyFraction=70"

For parameters, see dubbo configuration.
2. Set jvm parameters for zookeeper Setting method:
In the zookeeper bin directory, modify ZkEnv. sh:
Add SERVER_JVMFLAGSVariable.

ZOOBINDIR="${ZOOBINDIR:-/usr/bin}"ZOOKEEPER_PREFIX="${ZOOBINDIR}/.."SERVER_JVMFLAGS=" -server -Xmx2g -Xms2g -Xmn256m -XX:PermSize=128m -Xss256k -XX:+DisableExplicitGC \  -XX:+UseConcMarkSweepGC -XX:+CMSParallelRemarkEnabled -XX:+UseCMSCompactAtFullCollection \  -XX:LargePageSizeInBytes=128m -XX:+UseFastAccessorMethods -XX:+UseCMSInitiatingOccupancyOnly \  -XX:CMSInitiatingOccupancyFraction=70 "

For parameters, see dubbo configuration.

3. Set jvm parameters in ActiveMQ.
Setting method:
Modify the ActiveMQ script in the activemq bin directory and set it in the header:
Add the ACTIVEMQ_OPTS_MEMORY variable.

ACTIVEMQ_OPTS_MEMORY=" -server -Xmx5g -Xms5g -Xmn1280m -XX:PermSize=640m -Xss1280k -XX:+DisableExplicitGC \  -XX:+UseConcMarkSweepGC -XX:+CMSParallelRemarkEnabled -XX:+UseCMSCompactAtFullCollection \  -XX:LargePageSizeInBytes=128m -XX:+UseFastAccessorMethods -XX:+UseCMSInitiatingOccupancyOnly \  -XX:CMSInitiatingOccupancyFraction=70 "

For parameters, see dubbo configuration.

4. Set jvm parameters for kafka
Setting method:

Modify the kafka-server-start.sh file under the Kafka bin directory:

export KAFKA_HEAP_OPTS=" -Xmx5g -Xms5g -Xmn1280m -XX:PermSize=640m -Xss1280k "