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The default GC algorithm G1 that is enabled by default with Java11 serves well on multiprocessor machines with large amount of memory where GC is probablistic with low pauses, where response time is more important than throughput and GC is kept shorter. The CloudStack management server is largely a multi-threaded server application that handles and orchestrates several network requests, and has the default max. heap size of only 2G that can be considered a small/medium application from a heap size perspective. Perhaps a more aggresive GC algorithm such as ParallelGC as used in Java8 and before (that is previous CloudStack releases) would serve better for throughput and cause more aggresive GC. Reference: https://docs.oracle.com/en/java/javase/11/gctuning/available-collectors.html#GUID-13943556-F521-4287-AAAA-AE5DE68777CD Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>
32 lines
2.1 KiB
Plaintext
32 lines
2.1 KiB
Plaintext
# Licensed to the Apache Software Foundation (ASF) under one
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# or more contributor license agreements. See the NOTICE file
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# distributed with this work for additional information
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# regarding copyright ownership. The ASF licenses this file
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# to you under the Apache License, Version 2.0 (the
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# "License"); you may not use this file except in compliance
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# with the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing,
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# software distributed under the License is distributed on an
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# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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# KIND, either express or implied. See the License for the
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# specific language governing permissions and limitations
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# under the License.
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JAVA_OPTS="-Djava.security.properties=/etc/cloudstack/management/java.security.ciphers -Djava.awt.headless=true -Dcom.sun.management.jmxremote=false -Xmx2G -XX:+UseParallelGC -XX:MaxGCPauseMillis=500 -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=/var/log/cloudstack/management/ -XX:ErrorFile=/var/log/cloudstack/management/cloudstack-management.err "
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CLASSPATH="/usr/share/cloudstack-management/lib/*:/etc/cloudstack/management:/usr/share/cloudstack-common:/usr/share/cloudstack-management/setup:/usr/share/cloudstack-management:/usr/share/java/mysql-connector-java.jar"
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BOOTSTRAP_CLASS=org.apache.cloudstack.ServerDaemon
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################################################################################################
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#You can uncomment one of these options if you want to enable Java remote debugging. #
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#You can change the parameters at your will. The 'address' field defines the port to be used. #
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################################################################################################
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# This option here should be used with 'systemmd' based operating systems such as CentOS7, Ubuntu 16, and so on.
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#JAVA_DEBUG="-agentlib:jdwp=transport=dt_socket,address=8000,server=y,suspend=n"
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# On the other hand, this option is used by CentOS6.
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#JAVA_DEBUG="-Xrunjdwp:transport=dt_socket,address=8000,server=y,suspend=n" |