Advanced parametersΒΆ

Part of pypowsybl is based on Java code compiled to a native library using GraalVM native image compiler. Compiled Java code relies on a small runtime (called SubstratVM) responsible for managing memory (this is essentially a garbage collector). Additional parameters can be passed to SubstratVM using the environment variable GRAALVM_OPTIONS.

By default, the maximum allowed memory (Xmx) is automatically defined based on machine memory. We can pass a specific value like this:

GRAALVM_OPTIONS="-Xmx1G" python

import logging
logging.basicConfig()
logging.getLogger('powsybl').setLevel(logging.DEBUG)
import pypowsybl as pp
DEBUG:powsybl:Max heap is 1086 MB