new

# File activerecord/lib/active_record/connection_adapters/abstract/connection_pool.rb, line 488
      def initialize
        # These caches are keyed by klass.name, NOT klass. Keying them by klass
        # alone would lead to memory leaks in development mode as all previous
        # instances of the class would stay in memory.
        @owner_to_pool = ThreadSafe::Cache.new(:initial_capacity => 2) do |h,k|
          h[k] = ThreadSafe::Cache.new(:initial_capacity => 2)
        end
        @class_to_pool = ThreadSafe::Cache.new(:initial_capacity => 2) do |h,k|
          h[k] = ThreadSafe::Cache.new
        end
      end