What to do if java has insufficient memory

Solution to insufficient Java memory: 1. Use the top command on Linux to view all processes, selectively kill large memory, and release memory; 2. Adjust the jvm memory configuration in tomca, such as changing the minimum memory Set it smaller.

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Solution to insufficient java memory:

1. Use the top command on Linux to view all processes to see which processes occupy too much memory. Selective kill to release memory, but this needs to be understood clearly. Resting processes is not necessary. .

2. Adjust the jvm memory configuration in tomca, because the main jvm memory refers to the jvm heap memory.

So the solution:

JAVA_OPTS="-server -Xms256m -Xmx512m -XX:PermSize=128m -XX:MaxPermSize=256m"

Set the minimum memory of the above heap -Xms256 minimum memory to a smaller point, for example: before -Xms2048m. 2048M is too big, maybe the physical memory is not that big, so change it to -Xms256 (I adjusted it to 256). You can adjust it later as needed, or add memory modules.

The second solution I usually use is controlled within the scope of my own application.

JAVA_OPTS="-server -Xms256m -Xmx512m -XX:PermSize=128m -XX:MaxPermSize=256m"

Where is it placed in linux?

cd Go to the /bin directory of tomcat and find the catalina.sh file

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