Heap for Cassandra and Streamer is automatically calculated by WitFoo Superintendent and normally does not require override. In cases where the heap calculations need to be accomplished these two commands can be used.
echo 1000 > /witfooprecinct/streamer.mem
to set Heap to 1,000MB on Streamer (1000 should be replaced with actual value to set heap.
echo 3000 > /witfooprecinct/cassandra.mem
to set Cassandra Heap to 3,000MB