Page Comparison

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And then paste the following script into the file, making sure that the script is adjusted so that: 

• JAVA_HOME

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• is the

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• base installation of Java. If you don't know where this is, run the command:

update-alternatives --list java

This will give you the full path of the java program, for example: /usr/lib/jvm/temurin-11-jdk-amd64/bin/java. The installation directory in this case is /usr/lib/jvm/temurin-11-jdk-amd64.

• The memory settings (-Xms and -Xmx) on the line for CATALINA_OPTS are set as needed (this example assumes you are allocating 8GB of memory to tomcat); see Tomcat

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• Planning for details of estimating Tomcat's memory allocation

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• The location of the GC (Garbage Collection) log file, set in CATALINA_OPTS, is correct - in the examples below, this /opt/tomcat/logs

Java 8

[Unit]
Description=Apache Tomcat Web Application Container
After=network.target

[Service]
Type=forking

Environment=JAVA_HOME=/usr/optlib/jdkjvm/jdk1.8.0_85/jretemurin-8-jdk-amd64
Environment=CATALINA_PID=/opt/tomcat/temp/tomcat.pid
Environment=CATALINA_HOME=/opt/tomcat
Environment=CATALINA_BASE=/opt/tomcat
Environment='CATALINA_OPTS=-Xms8096M -Xmx8096M -server -XX:+PrintGCDetails -XX:+PrintGCDateStamps -Xloggc:/opt/tomcat/logs/gc-%%t.log'
Environment='JAVA_OPTS=-Djava.awt.headless=true'

ExecStart=/opt/tomcat/bin/startup.sh
ExecStop=/opt/tomcat/bin/shutdown.sh

WorkingDirectory=/opt/tomcat

User=tomcat
Group=tomcat
UMask=0007
RestartSec=10
Restart=always

[Install]
WantedBy=multi-user.target

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[Unit]
Description=Apache Tomcat Web Application Container
After=network.target

[Service]
Type=forking

Environment=JAVA_HOME=/usr/optlib/jdkjvm/temurin-11-jdk-11.0.13+8amd64
Environment=CATALINA_PID=/opt/tomcat/temp/tomcat.pid
Environment=CATALINA_HOME=/opt/tomcat
Environment=CATALINA_BASE=/opt/tomcat
Environment='CATALINA_OPTS=-Xms8096M -Xmx8096M -server -Xlog:gc=debug:file=/opt/tomcat/logs/gc-%%t.log:time,uptimemillis,tid'
Environment='JAVA_OPTS=-Djava.awt.headless=true'

ExecStart=/opt/tomcat/bin/startup.sh
ExecStop=/opt/tomcat/bin/shutdown.sh

WorkingDirectory=/opt/tomcat

User=tomcat
Group=tomcat
UMask=0007
RestartSec=10
Restart=always

[Install]
WantedBy=multi-user.target

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