Plugin to monitor the memory on a OS X system (Mavericks supported)

memory

#!/bin/sh
# -*- sh -*-

#: =cut
#
#=head1 NAME
#
#load - Plugin to monitor the memory on a system.
#
#=head1 AUTHOR
#
#Y.OKAMURA
#
#=head1 LICENSE
#
#GPLv3+
#
#=head1 MAGIC MARKERS
#
# #%# family=auto
# #%# capabilities=autoconf
#
#=cut

# If run with the "autoconf"-parameter, give our opinion on wether we
# should be run on this system or not. This is optinal, and only used by
# munin-config. In the case of this plugin, we should most probably
# always be included.

if [ "$1" = "autoconf" ]; then
        echo yes
        exit 0
fi

# If run with the "config"-parameter, give out information on how the
# graphs should look.

MEMSIZE=`sysctl hw.memsize|cut -f 2 -d ' '`
PAGESIZE=`sysctl hw.pagesize|cut -f 2 -d ' '`

if [ "$1" = "config" ]; then
    cat <<EOF
graph_args --base 1024 -l 0 --upper-limit $MEMSIZE
graph_vlabel Bytes
graph_title Memory usage
graph_category system
graph_info This graph shows what the machine uses memory for.
graph_order wired active inactive speculative free
wired.label Wired
wired.draw AREA
speculative.label speculative
speculative.draw STACK
active.label active
active.draw STACK
inactive.label inactive
inactive.draw STACK
compressed.label Compressed
compressed.draw STACK
free.label free
free.draw STACK
EOF
        # Last, if run with the "config"-parameter, quit here (don't
        # display any data)
        exit 0
fi

# If not run with any parameters at all (or only unknown ones), do the
# real work - i.e. display the data. Almost always this will be
# "value" subfield for every data field.

echo 'free.value' $((`vm_stat|fgrep 'Pages free'|cut -f 2 -d ':'|sed -e 's/[\. ]//g'` * $PAGESIZE))
echo 'active.value' $((`vm_stat|fgrep 'Pages active'|cut -f 2 -d ':'|sed -e 's/[\. ]//g'` * $PAGESIZE))
echo 'inactive.value' $((`vm_stat|fgrep 'Pages inactive'|cut -f 2 -d ':'|sed -e 's/[\. ]//g'` * $PAGESIZE))
echo 'wired.value' $((`vm_stat|fgrep 'Pages wired'|cut -f 2 -d ':'|sed -e 's/[\. ]//g'` * $PAGESIZE))
echo 'compressed.value' $((`vm_stat|fgrep 'Pages occupied by compressor'|cut -f 2 -d ':'|sed -e 's/[\. ]//g'` * $PAGESIZE))
echo 'speculative.value' $((`vm_stat|fgrep 'Pages speculative'|cut -f 2 -d ':'|sed -e 's/[\. ]//g'` * $PAGESIZE))