Implement Ceiling of RAM/CPU of BPMNs, per worker

[galenatjpl]

Ceiling of "weight" (CPU/RAM) of processes on a worker.
BPMNs would be given a "weight" ahead of time, by a human. This could be determined by experimentation and testing of a workflow (means instead of maxes might want to be used here, but up to the human). If a weight is not available (not assigned), then a BPMN would just automatically be assigned a default weight. It would be just metadata about the BPMN. So somebody might say "edrgen.bpmn takes about 0.5 GB RAM, and uses about 30% CPU". So maybe there are two weights :
1). CPU worst case estimate,
2). memory worst case estimate.

And maybe you just can't exceed the machine's capacity by both of those measures.
The worker node would have to define a

• maxCpu
• maxMem.

When implementing this, one must be cognizant of the possibility that certain BPMNs may be starved out.

CURRENT PROJECT WORKAROUND: spend more money, and beef up worker instance classes, so that the worker can handle load.