class ActiveSupport::Cache::RedisCacheStore

def read_multi(*names)

fetched values.
Read multiple values at once. Returns a hash of requested keys ->

Cache Store API implementation.
def read_multi(*names)
  if mget_capable?
    instrument(:read_multi, names, options) do |payload|
      read_multi_mget(*names).tap do |results|
        payload[:hits] = results.keys
      end
    end
  else
    super
  end
end