You can tune the Java Virtual Machine (JVM) settings to make a production system more efficient.
You can configure the JVM parameters in the <EI_HOME>/bin/integrator.bat file (on Windows) or the <EI_HOME>/bin/integrator.sh file (on Linux/Solaris). Following are the most important JVM parameters you need to configure:
Maximum Heap Memory Allocation (Xmx) - This parameter sets the maximum heap memory allocated for the JVM. Increasing the memory allocation increases the memory available for the server, which results in increasing the maximum TPS and reducing the latency. We recommend al least 2 GB of heap memory allocation for instances.
For example, If you want to set 2 GB as the maximum heap memory size, you need to configure the parameter as follows:-Xms2048m -Xmx2048m -XX:MaxPermSize=1024m
Here,
Xmx is the maximum memory allocation pool for a JVM.
Xms is the initial memory allocation pool.
XX:MaxPermSize is the permanent space where the classes, methods, internalized strings, and similar objects used by the VM are stored and never deallocated.When using JDK 1.8.*, you do not need to specify MaxPermSize since it has been removed with this version of Java.
Metaspace size - In JDK 1.8.*, class metadata is stored in the native heap, and this space is called Metaspace. By default class metadata allocation is only limited by the amount of available native memory. If you need to limit the amount of native memory used for class metadata, you need to set MaxMetaspaceSize.
To ensure stability of a production system, you can set the MaxMetaspaceSize parameter to 1GB as follows:-XX:MaxMetaspaceSize=1g