In this guide you will learn how to increase the Java Heap size in Tomcat Application Server
Method 1:
1) Go to <Tomcat Instalation Directory>/bin and create a file named setenv.sh if you are using Linux operating systems or setenv.bat for Windows.
2) Inside the setenv file, use the following parameters to set the heap size:
Linux:
export CATALINA_OPTS=”-Xms4096M -Xmx4096M”
Windows:
set CATALINA_OPTS=-Xms4096M -Xmx4096M
3) Make sure that both the values match for minimum and maximum.
4) Save the file and restart the Tomcat Application Server.
Мethod 2:
1 ) Go to Start Menu – >Apache Tomcat 9.0 (You version may vary) – >Configure Tomcat
2) The Apache Tomcat 9.0 Properties Window will apear.
3) Go to Java tab – > Maximum memory pool
4) Increase the Heap Size, Save the changes and restart Tomcat Application Server.
Important: The memory used will decrease available RAM on the machine. This may lead to performance problems if set too high.
That’s it!
