Are there any existing tools to stat real-time hit ratio like truenas?

[GrayXu]

I know that arc_summary reads the stat data of /proc/spl/kstat/zfs/* to show overall hit ratio since the last boot (or import). But I was wondering are there any existing tools to stat real-time hit ratio like truenas?

Or I should write one oneself...

[GrayXu]

just found a simple shell version
CroneKorkN, zfs arc hit ratio monitor, https://gist.github.com/CroneKorkN/476778bb669dcb7610ba7f8ac5a930bb

[GrayXu]

found some related discussions
https://forums.freebsd.org/threads/openzfs-graphing-arc-and-l2arc.83058/
https://www.reddit.com/r/zfs/comments/436axr/monitoring_zfs_performance_long_term/
And it seems like many monitoring tools have zfs related plugins

close!

[grahamperrin]

Also sysutils/zfs-stats for FreeBSD. A shot of zfs-mon in xterm: