Netlogo Heap

[ptheywood]

If models are scaled up to the extent that more than 1024MB of JVM heap are requried, the netlogo_headless.sh distribtued with netlogo is insufficient.

If this occurs, the script does not return, hanging indefinately.

The postprocessing of stdout from this consumes this error message, so from a runall.sh it just looks like it's waiting for netlogo to run.

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The explicit setting of -Xmx1024m in /opt/netlogo/netlogo-headless.sh prevents use of JAVA_TOOLS_OPTIONS=-Xmx8192m (or the implicit default of 1/4 system memory) to override this, allowing larger netlogo models.

This could be resolved, when using a container, by mutating this file during netlogo installation, removing the limit, then setting JAVA_TOOLS_OPTIONS to a sane value for the container if required (plus documenting for users)