code: func NewHeuristicWatchCacheSizes(expectedRAMCapacityMB int) map[schema.GroupResource]int {
  	// From our documentation, we officially recommend 120GB machines for
  	// 2000 nodes, and we scale from that point. Thus we assume ~60MB of
  	// capacity per node.
  	// TODO: Revisit this heuristics
  	clusterSize := expectedRAMCapacityMB / 60
  
  	// We should specify cache size for a given resource only if it
  	// is supposed to have non-default value.
  	//
  	// TODO: Figure out which resource we should have non-default value.
  	watchCacheSizes := make(map[schema.GroupResource]int)
  	watchCacheSizes[schema.GroupResource{Resource: "replicationcontrollers"}] = maxInt(5*clusterSize, 100)
  	watchCacheSizes[schema.GroupResource{Resource: "endpoints"}] = maxInt(10*clusterSize, 1000)
  	watchCacheSizes[schema.GroupResource{Resource: "nodes"}] = maxInt(5*clusterSize, 1000)
  	watchCacheSizes[schema.GroupResource{Resource: "pods"}] = maxInt(50*clusterSize, 1000)
  	watchCacheSizes[schema.GroupResource{Resource: "services"}] = maxInt(5*clusterSize, 1000)
  	watchCacheSizes[schema.GroupResource{Resource: "events"}] = 0
  	watchCacheSizes[schema.GroupResource{Resource: "apiservices", Group: "apiregistration.k8s.io"}] = maxInt(5*clusterSize, 1000)
  	return watchCacheSizes
  }
docs: // NewHeuristicWatchCacheSizes returns a map of suggested watch cache sizes based on total
  // memory.