Can tomcat increase memory in linux?

Tomcat in Linux can increase the memory. You can increase Tomcat's memory by adding the statement "JAVA_OPTS='-Xms initialization memory size -Xmx maximum memory that can be used'" in front of the "/bin/catalina.sh" file.

#The operating environment of this tutorial: linux7.3 system, Dell G3 computer.

Can Tomcat in Linux increase the memory?

Can Tomcat in Linux increase the memory

The memory that Tomcat can use by default is 128MB. In large-scale application projects, this memory is not enough and needs to be increased.

Under Windows, in the file /bin/catalina.bat, under Unix, in front of the file /bin/catalina.sh, add the following settings:

JAVA_OPTS='-Xms【初始化内存大小】 -Xmx【可以使用的最大内存】'

You need to change these two parameter values turn up. For example:

JAVA_OPTS='-Xms256m -Xmx512m'

indicates that the initial memory is 256MB and the maximum memory that can be used is 512MB.

Extended knowledge:

How to set the memory size of Tomcat's JVM virtual machine

You can set the memory used by the Java virtual machine, but if your If you choose incorrectly, the virtual machine will not compensate. You can change the memory size used by the virtual machine through the command line. As shown in the following table, there are two parameters used to set the memory size used by the virtual machine.

-Xms The size of the JVM initialization heap

-Xmx The maximum value of the JVM heap

The sizes of these two values are generally set according to needs. The size of the initialization heap determines the size of memory that the virtual machine applies to the system when it starts. Generally speaking, this parameter is not important. However, some applications will drastically occupy more memory under heavy load. At this time, this parameter is very important. If the memory used when the virtual machine is started is relatively small and there are many objects in this case, After initialization, the virtual machine must repeatedly increase memory to meet usage. For this reason, we generally set -Xms and -Xmx to be the same size, and the maximum size of the heap is limited by the physical memory used by the system.

Generally, applications that use large amounts of data will use persistent objects, and memory usage may increase rapidly. When the memory required by an application exceeds the maximum heap value, the virtual machine will prompt a memory overflow and cause the application service to crash. Therefore, it is generally recommended that the maximum heap size be set to 80% of the maximum available memory.

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