pool_transaction_isolation_level=

# File activerecord/lib/active_record/connection_adapters/abstract/connection_pool.rb, line 896
      def pool_transaction_isolation_level=(isolation_level)
        isolation_level_key = "activerecord_pool_transaction_isolation_level_#{db_config.name}"
        ActiveSupport::IsolatedExecutionState[isolation_level_key] = isolation_level
      end