nano ~/memory.sh

#!/bin/bash
# memory.sh - Memory usage stats

rrdtool=/usr/bin/rrdtool
db=/hdd/rrd/memory.rrd
# mempool-ram db added
mpdb=/hdd/rrd/mempool-ram.rrd
img=/hdd/www/html/images

if [ ! -e $db ]
then
$rrdtool create $db \
--step 300 \
DS:usage:GAUGE:600:0:U \
RRA:AVERAGE:0.5:1:288 \
RRA:AVERAGE:0.5:3:672 \
RRA:AVERAGE:0.5:12:744 \
RRA:AVERAGE:0.5:72:1480
fi

# mempool db creation added
if [ ! -e $mpdb ]
then
$rrdtool create $mpdb \
--step 300 \
DS:mempoolmb:GAUGE:600:0:U \
RRA:AVERAGE:0.5:1:288 \
RRA:AVERAGE:0.5:3:672 \
RRA:AVERAGE:0.5:12:744 \
RRA:AVERAGE:0.5:72:1480
fi

$rrdtool update $db -t usage N:`free -b |grep cache:|cut -d":" -f2|awk '{print $1}'`
# mempool db update added
n=`/usr/local/bin/bitcoin-cli getmempoolinfo | jq '.usage'`
$rrdtool update $mpdb -t mempoolmb N:"$n"

# mempool added to graph
for period in day week month year
do
$rrdtool graph $img/memory-$period.png -s -1$period \
-t "Memory usage last $period" -z \
-c "BACK#FFFFFF" -c "SHADEA#FFFFFF" -c "SHADEB#FFFFFF" \
-c "MGRID#AAAAAA" -c "GRID#CCCCCC" -c "ARROW#333333" \
-c "FONT#333333" -c "AXIS#333333" -c "FRAME#333333" \
        -h 134 -w 543 -l 0 -a PNG -v "RAM" \
DEF:usage=$db:usage:AVERAGE \
DEF:mempoolmb=$mpdb:mempoolmb:AVERAGE \
VDEF:min=usage,MINIMUM \
VDEF:max=usage,MAXIMUM \
VDEF:avg=usage,AVERAGE \
VDEF:lst=usage,LAST \
VDEF:mpmin=mempoolmb,MINIMUM \
VDEF:mpmax=mempoolmb,MAXIMUM \
VDEF:mpavg=mempoolmb,AVERAGE \
VDEF:mplst=mempoolmb,LAST \
"COMMENT:      \l" \
"COMMENT:        " \
"COMMENT:         " \
"COMMENT:Minimum    " \
"COMMENT:Maximum    " \
"COMMENT:Average     " \
"COMMENT:Last    \l" \
"COMMENT:   " \
"AREA:usage#92CF00:Usage      " \
"LINE1:usage#3F5A00" \
"GPRINT:min:%5.1lf %sB   " \
"GPRINT:max:%5.1lf %sB   " \
"GPRINT:avg:%5.1lf %sB   " \
"GPRINT:lst:%5.1lf %sB   \l" \
"COMMENT:   " \
"AREA:mempoolmb#8AD3F1:Mempool    " \
"LINE1:mempoolmb#49BEEF" \
"GPRINT:mpmin:%5.1lf %sB   " \
"GPRINT:mpmax:%5.1lf %sB   " \
"GPRINT:mpavg:%5.1lf %sB   " \
"GPRINT:mplst:%5.1lf %sB   \l" >dev/null
done