MEMORY_TO_TMP_SIZE_RATIO

controller.constants.MEMORY_TO_TMP_SIZE_RATIO = 4.0

Ratio of maximum memory size to maximum size of /tmp filesystem.

If tmp is set to come out of pod memory, this obviously must be set to a value greater than one. If it comes out of disk it is ephemeral storage, which is also sharply limited by node-local attached disk.