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#!/bin/sh
#
# $FreeBSD$
set -e
set -u
UNCOMP_ARC=$(sysctl -n kstat.zfs.misc.arcstats.uncompressed_size)
COMP_ARC=$(sysctl -n kstat.zfs.misc.arcstats.compressed_size)
value=$(bc -e scale=2 -e "$UNCOMP_ARC/$COMP_ARC" -e quit)
cat <<EOM
graph_title ZFS ARC compression ratio
graph_vlabel ratio
graph_category ZFS
graph_info This graph shows the ZFS ARC compression (uncompressed vs. compressed) ratio
ratio.label ratio
ratio.value $value
EOM
exit 0
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