If the Load Generator frequently uses more than 90% of the available memory during a test, it can lead to errors such as NL-RUNTIME-XX in the test results. The details of these errors are shown as
java.lang.OutOfMemoryError: Java heap space. The Load Generator is a Java program which, by default, is configured to use a maximum of 384 Mb of memory. For extreme load tests, this limit may be raised to 512 Mb or even 1024 Mb.
For more information, see Increase available memory for Load Generators<in_pdf_install>.