gnuplot

#!/usr/bin/env bash

echo "set terminal png;\
      set datafile separator \",\";\
      set ylabel \"Mb\"; \
      set yrange [0:2000]; \
      plot \"mem.log\" using (\$0+1):(\$2/1000000) smooth csplines with line title \"rss\", \
           \"mem.log\" using (\$0+1):(\$3/1000000) smooth csplines with line title \"heapTotal\", \
           \"mem.log\" using (\$0+1):(\$4/1000000) smooth csplines with line title \"heapUsed\" \
" | gnuplot -p > out.png