Munin contributed plugins

#!/bin/sh

# ZFS ARC statistics for FreeBSD

# Author alex@trull.org:

#

#%# family=auto

#%# capabilities=autoconf

sysctl='/sbin/sysctl'

ostype=`uname -s`

procfile='/proc/spl/kstat/zfs/arcstats'

case $1 in

    config)

    cat <<EOF

graph_title ZFS ARC efficiency

graph_vlabel %

graph_scale no

graph_category fs

graph_args -l 0

graph_info FreeBSD ZFS ARC Utilisation - Counters

graph_period minute

graph_order hits misses l2_hits l2_misses mfu_hits mru_hits arc_access_total mfu_hits_perc mru_hits_perc arc_misses_perc l2_efficency_tot

deleted.graph no

deleted.min 0

deleted.type DERIVE

deleted.label Deleted?

demand_data_hits.graph no

demand_data_hits.min 0

demand_data_hits.type DERIVE

demand_data_hits.label Cache hits - demand data

demand_data_misses.graph no

demand_data_misses.min 0

demand_data_misses.type DERIVE

demand_data_misses.label Cache miss - demand data

demand_metadata_hits.graph no

demand_metadata_hits.min 0

demand_metadata_hits.type DERIVE

demand_metadata_hits.label Cache hits - metadata

demand_metadata_misses.graph no

demand_metadata_misses.min 0

demand_metadata_misses.type DERIVE

demand_metadata_misses.label Cache miss - metadata

evict_skip.graph no

evict_skip.min 0

evict_skip.type DERIVE

evict_skip.label evict_skip?

hash_chain_max.graph no

hash_chain_max.min 0

hash_chain_max.type DERIVE

hash_chain_max.label hash_chain_max?

hash_chains.graph no

hash_chains.min 0

hash_chains.type DERIVE

hash_chains.label hash_chains?

hash_collisions.graph no

hash_collisions.min 0

hash_collisions.type DERIVE

hash_collisions.label hash_collisions?

hash_elements.graph no

hash_elements.min 0

hash_elements.type DERIVE

hash_elements.label hash_elements

hash_elements_max.graph no

hash_elements_max.min 0

hash_elements_max.type DERIVE

hash_elements_max.label hash_elements_max?

hits.graph no

hits.min 0

hits.type DERIVE

hits.label Cache hits

l2_abort_lowmem.graph no

l2_abort_lowmem.min 0

l2_abort_lowmem.type GAUGE

l2_cksum_bad.graph no

l2_cksum_bad.min 0

l2_cksum_bad.type DERIVE

l2_cksum_bad.label ARCL2 Bad checksum errors

l2_evict_lock_retry.graph no

l2_evict_lock_retry.min 0

l2_evict_lock_retry.type DERIVE

l2_evict_reading.graph no

l2_evict_reading.min 0

l2_evict_reading.type DERIVE

l2_feeds.graph no

l2_feeds.min 0

l2_feeds.type DERIVE

l2_free_on_write.graph no

l2_free_on_write.min 0

l2_free_on_write.type DERIVE

l2_hits.graph no

l2_hits.min 0

l2_hits.type DERIVE

l2_hits.label L2ARC hits

l2_io_error.graph no

l2_io_error.min 0

l2_io_error.type DERIVE

l2_io_error.label L2AC I/O errors

l2_misses.graph no

l2_misses.min 0

l2_misses.type DERIVE

l2_misses.label L2ARC cache misses

l2_rw_clash.graph no

l2_rw_clash.min 0

l2_rw_clash.type DERIVE

l2_writes_done.graph no

l2_writes_done.min 0

l2_writes_done.type DERIVE

l2_writes_error.graph no

l2_writes_error.min 0

l2_writes_error.type DERIVE

l2_writes_hdr_miss.graph no

l2_writes_hdr_miss.min 0

l2_writes_hdr_miss.type DERIVE

l2_writes_hdr_miss.label L2ARC Header misses

l2_writes_sent.graph no

l2_writes_sent.min 0

l2_writes_sent.type DERIVE

l2_writes_sent.label L2ARC writes sent

memory_throttle_count.graph no

memory_throttle_count.min 0

memory_throttle_count.label memory_throttle_count?

mfu_ghost_hits.graph no

mfu_ghost_hits.min 0

mfu_ghost_hits.type DERIVE

mfu_ghost_hits.label Most frequently used ghost hits

mfu_hits.graph no

mfu_hits.min 0

mfu_hits.type DERIVE

mfu_hits.label Most frequently used hits

misses.graph no

misses.min 0

misses.type DERIVE

misses.label Cache misses

mru_ghost_hits.graph no

mru_ghost_hits.min 0

mru_ghost_hits.type DERIVE

mru_ghost_hits.label Most recently used ghost hits

mru_hits.graph no

mru_hits.min 0

mru_hits.type DERIVE

mru_hits.label Most recently used hits

mutex_miss.graph no

mutex_miss.min 0

mutex_miss.type DERIVE

prefetch_data_hits.graph no

prefetch_data_hits.min 0

prefetch_data_hits.type DERIVE

prefetch_data_hits.label Prefetch Data hits

prefetch_data_misses.graph no

prefetch_data_misses.min 0

prefetch_data_misses.type DERIVE

prefetch_data_misses.label Prefetch data misses

prefetch_metadata_hits.graph no

prefetch_metadata_hits.min 0

prefetch_metadata_hits.type DERIVE

prefetch_metadata_hits.label Prefetch metadata hits

prefetch_metadata_misses.graph no

prefetch_metadata_misses.min 0

prefetch_metadata_misses.type DERIVE

prefetch_metadata_misses.label Prefetch metadata misses

recycle_miss.graph no

recycle_miss.min 0

recycle_miss.type DERIVE

recycle_miss.label Recycle misses

arc_access_total.graph no

arc_access_total.cdef hits,misses,ADDNAN

arc_access_total.label ARC access total number

arc_hits_perc.cdef hits,100,*,arc_access_total,/

arc_hits_perc.label ARC hits

arc_hits_perc.graph no

real_hits.cdef mfu_hits,mru_hits,ADDNAN,100,*,hits,/

real_hits.label ARC real (MRU + MFU) hits (no ghost & anon)

real_hits.graph no

mfu_hits_perc.cdef mfu_hits,100,*,arc_access_total,/

mfu_hits_perc.label Most frequently used hits

mfu_hits_perc.graph yes

mfu_hits_perc.draw AREA

mru_hits_perc.cdef mru_hits,100,*,arc_access_total,/

mru_hits_perc.label Most recently used hits

mru_hits_perc.graph yes

mru_hits_perc.draw STACK

arc_misses_perc.graph yes

arc_misses_perc.cdef misses,100,*,arc_access_total,/

arc_misses_perc.label ARC misses

arc_misses_perc.draw STACK

l2_efficency_tot.graph yes

l2_efficency_tot.cdef l2_hits,100,*,l2_hits,l2_misses,hits,misses,ADDNAN,ADDNAN,ADDNAN,/

l2_efficency_tot.label L2ARC hit ratio of L1&L2 accesses

EOF

# demand_data_hits_perc.cdef demand_data_hits,100,*,hits,/

# demand_data_hits_perc.label Cache hits of demand data type

# demand_data_hits_perc.graph no

# demand_metadata_hits_perc.cdef demand_metadata_hits,100,*,hits,/

# demand_metadata_hits_perc.label Cache hits of Demand metadata type

# demand_metadata_hits_perc.graph no

# prefetch_data_hits_perc.cdef prefetch_data_hits,100,*,hits,/

# prefetch_data_hits_perc.label Prefetch data hits factor of all hits

# prefetch_data_hits_perc.graph no

# prefetch_metadata_hits_perc.cdef prefetch_metadata_hits,100,*,hits,/

# prefetch_metadata_hits_perc.label Prefetch metadata hits factor off hits

# prefetch_metadata_hits_perc.graph no

# demand_data_efficency.cdef demand_data_hits,100,*,demand_data_hits,demand_data_misses,ADDNAN,/

# demand_data_efficency.label Data demand efficiency

# demand_data_efficency.graph no

# anon_hits.graph no

# anon_hits.cdef hits,mfu_hits,mru_hits,mfu_ghost_hits,mru_ghost_hits,ADDNAN,ADDNAN,ADDNAN,-,100,*,hits,/

# anon_hits.label ARC Anon hits

# mfu_ghost_hits_perc.cdef mfu_ghost_hits,100,*,hits,/

# mfu_ghost_hits_perc.label Most frequently used ghost hits

# mfu_ghost_hits_perc.graph no

# mru_ghost_hits_perc.cdef mru_ghost_hits,100,*,hits,/

# mru_ghost_hits_perc.label Most recently used ghost hits

# mru_ghost_hits_perc.graph no

    exit 0

    ;;

    autoconf)

    if [ ! -x ${sysctl} ]; then

        echo "no (${sysctl} is not executable)"

    elif [ "${ostype}" = "FreeBSD" ]; then

        echo "yes"

    elif [ "${ostype}" = "Linux" ]; then

        if [ -f ${procfile} ]; then

            echo "yes"

        else

            echo "no (The statsfile does not exist: ${procfile})"

        fi

    else

        echo "no (Your OS is not supported by this plugin)"

    fi

    exit 0

    ;;

    suggest)

    exit 0

    ;;

esac

case ${ostype} in

    "FreeBSD")

        $sysctl kstat.zfs.misc.arcstats | sed -e 's/^kstat.zfs.misc.arcstats.//' -e 's/:/.value/'

    ;;

    "Linux")

        cat ${procfile} | tail -n +3 | sed -e 's/ \+/ /g' | cut -f 1,3 -d ' ' | sed -e 's/ /.value /'

    ;;

esac