- # Default value for keep_cache_ram of a container's runtime_constraints.
- DefaultKeepCacheRAM: 268435456
+ # Default value for keep_cache_ram of a container's
+ # runtime_constraints. Note: this gets added to the RAM request
+ # used to allocate a VM or submit an HPC job.
+ #
+ # If this is zero, container requests that don't specify RAM or
+ # disk cache size will use a disk cache, sized to the
+ # container's RAM requirement (but with minimum 2 GiB and
+ # maximum 32 GiB).
+ DefaultKeepCacheRAM: 0