rrdtool create j_matrix.rrd \
-s 60 \
DS:Mem_matrix:GAUGE:120:0:100  \
DS:Cpu_matrix:GAUGE:120:0:100  \
RRA:AVERAGE:0.5:1:100    \
RRA:AVERAGE:0.5:6:350    \
RRA:MIN:0.5:1:100        \
RRA:MIN:0.5:6:350        \
RRA:MAX:0.5:1:100        \
RRA:MAX:0.5:6:350