$rrd_def = RrdDefinition::make()
    ->addDataset('l2_abort_lowmem', 'DERIVE', 0)
    ->addDataset('l2_access_total', 'DERIVE', 0)
    ->addDataset('l2_asize', 'GAUGE', 0)
    ->addDataset('l2_bufc_d_asize', 'GAUGE', 0)