A port of ZFS stats for FreeBSD plugin to Linux Author of the original plugin: David Bjornsson dabb@lolnet.is Author of the Linux port: Alex Chistyakov alexclear@gmail.com some tweaks by Vendel Cseh csehvendel@gmail.com Usage: zfs_stats_FUNCTION

Available functions: efficiency - ARC efficiency cachehitlist - Cache hit by cache list cachehitdtype - Cache hit by data type utilization - ARC size breakdown l2utilization - L2ARC size breakdown l2efficiency - L2ARC efficiency

getting the variables is very very slow on original linux port..........

time cat /proc/spl/kstat/zfs/arcstats | grep "^hits" | awk '{print $3;}'

real 0m0.008s user 0m0.005s sys 0m0.011s

time awk '/^hits/{print $3}' /proc/spl/kstat/zfs/arcstats

real 0m0.003s user 0m0.001s sys 0m0.002s