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https://github.com/munin-monitoring/contrib.git
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c26049e8d2
Don't divide by zero if there is no l2arc Error output from zfs_stats_cachehitlist: dc: divide by zero
300 lines
11 KiB
Bash
Executable File
300 lines
11 KiB
Bash
Executable File
#!/bin/sh
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# ZFS statistics for FreeBSD
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# Author: David Bjornsson <dabb@lolnet.is>
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#
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# Description:
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# This is a rewrite of the zfs-stats-for-freebsd
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# scripts by patpro. Rather then pulling the
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# information from the zfs-stats utility, it
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# pulls it straight from sysctl.
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#
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# Tested on FreeBSD 9.0-RELEASE
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#
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# Usage: zfs_stats_FUNCTION
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#
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# Available functions:
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# efficiency - ARC efficiency
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# cachehitlist - Cache hit by cache list
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# cachehitdtype - Cache hit by data type
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# dmuprefetch - DMU prefetch
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# utilization - ARC size breakdown
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# l2utilization - L2ARC size breakdown
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# l2efficiency - L2ARC efficiency
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#
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#%# family=auto
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FUNCTION=$(basename $0 | cut -d_ -f3)
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PAGESIZE=`/sbin/sysctl -n vm.stats.vm.v_page_size`
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MEMSIZE=`/sbin/sysctl -n vm.stats.vm.v_page_count`
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MEMMAX=`echo 'scale=2;' $PAGESIZE*$MEMSIZE | /usr/bin/bc -q`
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BC='/usr/bin/bc -q'
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SYS='/sbin/sysctl -n'
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#
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# Sysctl macros
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#
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ARC_HITS=`$SYS kstat.zfs.misc.arcstats.hits`
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ARC_MISSES=`$SYS kstat.zfs.misc.arcstats.misses`
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DEMAND_DATA_HITS=`$SYS kstat.zfs.misc.arcstats.demand_data_hits`
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DEMAND_DATA_MISSES=`$SYS kstat.zfs.misc.arcstats.demand_data_misses`
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DEMAND_METADATA_HITS=`$SYS kstat.zfs.misc.arcstats.demand_metadata_hits`
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DEMAND_METADATA_MISSES=`$SYS kstat.zfs.misc.arcstats.demand_metadata_misses`
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MFU_GHOST_HITS=`$SYS kstat.zfs.misc.arcstats.mfu_ghost_hits`
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MFU_HITS=`$SYS kstat.zfs.misc.arcstats.mfu_hits`
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MRU_GHOST_HITS=`$SYS kstat.zfs.misc.arcstats.mru_ghost_hits`
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MRU_HITS=`$SYS kstat.zfs.misc.arcstats.mru_hits`
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PREFETCH_DATA_HITS=`$SYS kstat.zfs.misc.arcstats.prefetch_data_hits`
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PREFETCH_DATA_MISSES=`$SYS kstat.zfs.misc.arcstats.prefetch_data_misses`
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PREFETCH_METADATA_HITS=`$SYS kstat.zfs.misc.arcstats.prefetch_metadata_hits`
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PREFETCH_METADATA_MISSES=`$SYS kstat.zfs.misc.arcstats.prefetch_metadata_misses`
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DMU_HITS=`$SYS kstat.zfs.misc.zfetchstats.hits`
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DMU_MISSES=`$SYS kstat.zfs.misc.zfetchstats.misses`
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SIZE=`$SYS kstat.zfs.misc.arcstats.size`
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MRU_SIZE=`$SYS kstat.zfs.misc.arcstats.p`
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MAX_SIZE=`$SYS kstat.zfs.misc.arcstats.c_max`
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MIN_SIZE=`$SYS kstat.zfs.misc.arcstats.c_min`
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TARGET_SIZE=`$SYS kstat.zfs.misc.arcstats.c`
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L2_SIZE=`$SYS kstat.zfs.misc.arcstats.l2_size`
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L2_HDR_SIZE=`$SYS kstat.zfs.misc.arcstats.l2_hdr_size`
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L2_HITS=`$SYS kstat.zfs.misc.arcstats.l2_hits`
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L2_MISSES=`$SYS kstat.zfs.misc.arcstats.l2_misses`
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#
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# Calculation macros
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#
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ANON_HITS=`echo "$ARC_HITS-($MFU_HITS+$MRU_HITS+$MFU_GHOST_HITS+$MRU_GHOST_HITS)" | $BC`
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ARC_ACCESSES_TOTAL=`echo "$ARC_HITS+$ARC_MISSES" | $BC`
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DEMAND_DATA_TOTAL=`echo "$DEMAND_DATA_HITS+$DEMAND_DATA_MISSES" | $BC`
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PREFETCH_DATA_TOTAL=`echo "$PREFETCH_DATA_HITS+$PREFETCH_DATA_MISSES" | $BC`
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REAL_HITS=`echo "$MFU_HITS+$MRU_HITS" | $BC`
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CACHE_HIT_RATIO_PERC=`echo "scale=2 ; (100*$ARC_HITS/$ARC_ACCESSES_TOTAL)" | $BC`
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CACHE_MISS_RATIO_PERC=`echo "scale=2 ; (100*$ARC_MISSES/$ARC_ACCESSES_TOTAL)" | $BC`
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ACTUAL_HIT_RATIO_PERC=`echo "scale=2 ; (100*$REAL_HITS/$ARC_ACCESSES_TOTAL)" | $BC`
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DATA_DEMAND_EFFICIENCY_PERC=`echo "scale=2 ; (100*$DEMAND_DATA_HITS/$DEMAND_DATA_TOTAL)" | $BC`
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DATA_PREFETCH_EFFICENCY_PERC=`echo "scale=2 ; (100*$PREFETCH_DATA_HITS/$PREFETCH_DATA_TOTAL)" | $BC`
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ANONYMOUSLY_USED_PERC=`echo "scale=2 ; (100*$ANON_HITS/$ARC_HITS)" | $BC`
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MOST_RECENTLY_USED_PERC=`echo "scale=2 ; (100*$MRU_HITS/$ARC_HITS)" | $BC`
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MOST_FREQUENTLY_USED_PERC=`echo "scale=2 ; (100*$MFU_HITS/$ARC_HITS)" | $BC`
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MOST_RECENTLY_USED_GHOST_PERC=`echo "scale=2 ; (100*$MRU_GHOST_HITS/$ARC_HITS)" | $BC`
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MOST_FREQUENTLY_USED_GHOST_PERC=`echo "scale=2 ; (100*$MFU_GHOST_HITS/$ARC_HITS)" | $BC`
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DEMAND_DATA_HIT_PERC=`echo "scale=2 ; (100*$DEMAND_DATA_HITS/$ARC_HITS)" | $BC`
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DEMAND_DATA_MISS_PERC=`echo "scale=2 ; (100*$DEMAND_DATA_MISSES/$ARC_MISSES)" | $BC`
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PREFETCH_DATA_HIT_PERC=`echo "scale=2 ; (100*$PREFETCH_DATA_HITS/$ARC_HITS)" | $BC`
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PREFETCH_DATA_MISS_PERC=`echo "scale=2 ; (100*$PREFETCH_DATA_MISSES/$ARC_MISSES)" | $BC`
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DEMAND_METADATA_HIT_PERC=`echo "scale=2 ; (100*$DEMAND_METADATA_HITS/$ARC_HITS)" | $BC`
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DEMAND_METADATA_MISS_PERC=`echo "scale=2 ; (100*$DEMAND_METADATA_MISSES/$ARC_MISSES)" | $BC`
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PREFETCH_METADATA_HIT_PERC=`echo "scale=2 ; (100*$PREFETCH_METADATA_HITS/$ARC_HITS)" | $BC`
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PREFETCH_METADATA_MISSES_PERC=`echo "scale=2 ; (100*$PREFETCH_METADATA_MISSES/$ARC_MISSES)" | $BC`
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DMU_TOTAL=`echo "$DMU_HITS+$DMU_MISSES" | $BC`
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DMU_HITS_PERC=`echo "scale=2 ; (100*$DMU_HITS/$DMU_TOTAL)" | $BC`
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DMU_MISSES_PERC=`echo "scale=2 ; (100*$DMU_MISSES/$DMU_TOTAL)" | $BC`
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if [ $SIZE -gt $TARGET_SIZE ]; then
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MFU_SIZE=`echo "$SIZE-$MRU_SIZE" | $BC`
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else
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MFU_SIZE=`echo "$TARGET_SIZE-$MRU_SIZE" | $BC`
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fi
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L2_ACCESSES_TOTAL=`echo "$L2_HITS+$L2_MISSES" | $BC`
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if [ $L2_ACCESSES_TOTAL -gt 0 ]; then
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L2_HIT_RATIO_PERC=`echo "scale=2 ; (100*$L2_HITS/$L2_ACCESSES_TOTAL)" | $BC`
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L2_MISS_RATIO_PERC=`echo "scale=2 ; (100*$L2_MISSES/$L2_ACCESSES_TOTAL)" | $BC`
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fi
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efficiency() {
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if [ "$1" = "config" ]; then
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echo 'graph_title ZFS ARC Efficiency'
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echo 'graph_args -u 100'
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echo 'graph_vlabel %'
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echo 'graph_info This graph shows the ARC Efficiency'
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echo 'hits.label Hit Ratio'
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echo 'misses.label Miss Ratio'
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echo 'actual_hits.label Actual Hit Ratio'
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echo 'data_demand_efficiency.label Data Demand Efficiency'
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echo 'data_prefetch_efficiency.label Data Prefetch Efficiency'
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exit 0
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else
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echo 'hits.value ' $CACHE_HIT_RATIO_PERC
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echo 'misses.value ' $CACHE_MISS_RATIO_PERC
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echo 'actual_hits.value ' $ACTUAL_HIT_RATIO_PERC
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echo 'data_demand_efficiency.value ' $DATA_DEMAND_EFFICIENCY_PERC
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echo 'data_prefetch_efficiency.value ' $DATA_PREFETCH_EFFICENCY_PERC
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fi
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}
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cachehitlist() {
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if [ "$1" = "config" ]; then
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echo 'graph_title ZFS ARC Efficiency: Cache hits by cache list'
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echo 'graph_args -u 100'
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echo 'graph_vlabel %'
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echo 'graph_info This graph shows the ARC Efficiency'
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echo 'cache_list_anon.label Anonymously Used'
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echo 'cache_list_most_rec.label Most Recently Used'
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echo 'cache_list_most_freq.label Most Frequently Used'
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echo 'cache_list_most_rec_ghost.label Most Recently Used Ghost'
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echo 'cache_list_most_freq_ghost.label Most Frequently Used Ghost'
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exit 0
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else
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echo 'cache_list_anon.value ' $ANONYMOUSLY_USED_PERC
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echo 'cache_list_most_rec.value ' $MOST_RECENTLY_USED_PERC
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echo 'cache_list_most_freq.value ' $MOST_FREQUENTLY_USED_PERC
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echo 'cache_list_most_rec_ghost.value ' $MOST_RECENTLY_USED_GHOST_PERC
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echo 'cache_list_most_freq_ghost.value ' $MOST_FREQUENTLY_USED_GHOST_PERC
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fi
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}
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cachehitdtype() {
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if [ "$1" = "config" ]; then
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echo 'graph_title ZFS ARC Efficiency: Cache hits by data type'
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echo 'graph_args -u 100'
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echo 'graph_vlabel %'
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echo 'graph_info This graph shows the ARC Efficiency'
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echo 'data_type_demand_hits.label Demand Data Hit Ratio'
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echo 'data_type_demand_misses.label Demand Data Miss Ratio'
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echo 'data_type_prefetch_hits.label Prefetch Data Hit Ratio'
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echo 'data_type_prefetch_misses.label Prefetch Data Miss Ratio'
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echo 'data_type_demand_metadata_hits.label Demand Metadata Hit Ratio'
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echo 'data_type_demand_metadata_misses.label Demand Metadata Miss Ratio'
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echo 'data_type_prefetch_metadata_hits.label Prefetch Metadata Hit Ratio'
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echo 'data_type_prefetch_metadata_misses.label Prefetch Metadata Miss Ratio'
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exit 0
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else
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echo 'data_type_demand_hits.value ' $DEMAND_DATA_HIT_PERC
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echo 'data_type_demand_misses.value ' $DEMAND_DATA_MISS_PERC
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echo 'data_type_prefetch_hits.value ' $PREFETCH_DATA_HIT_PERC
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echo 'data_type_prefetch_misses.value ' $PREFETCH_DATA_MISS_PERC
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echo 'data_type_demand_metadata_hits.value ' $DEMAND_METADATA_HIT_PERC
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echo 'data_type_demand_metadata_misses.value ' $DEMAND_METADATA_MISS_PERC
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echo 'data_type_prefetch_metadata_hits.value ' $PREFETCH_METADATA_HIT_PERC
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echo 'data_type_prefetch_metadata_misses.value ' $PREFETCH_METADATA_MISSES_PERC
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fi
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}
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dmuprefetch() {
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if [ "$1" = "config" ]; then
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echo 'graph_title ZFS DMU prefetch stats'
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echo 'graph_args -u 100'
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echo 'graph_vlabel %'
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echo 'graph_info This graph shows the DMU prefetch stats'
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echo 'hits.label Hit Ratio'
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echo 'misses.label Miss Ratio'
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exit 0
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else
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echo 'hits.value ' $DMU_HITS_PERC
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echo 'misses.value ' $DMU_MISSES_PERC
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fi
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}
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utilization() {
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if [ "$1" = "config" ]; then
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echo 'graph_title ZFS ARC Size'
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echo 'graph_args --base 1024 -l 0 --vertical-label Bytes --upper-limit '$MEMMAX
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echo 'graph_vlabel Size in MB'
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echo 'graph_info This graph shows the ARC Size utilization'
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echo 'max_size.label Maximum Size'
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echo 'max_size.draw AREA'
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echo 'size.label Size'
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echo 'size.draw AREA'
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echo 'min_size.label Minimum Size'
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echo 'min_size.draw AREA'
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echo 'target_size.label Target Size'
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echo 'target_size.draw LINE1'
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echo 'recently_size.label Recently Used Cache Size'
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echo 'recently_size.draw LINE1'
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echo 'frequently_size.label Frequently Used Cache Size'
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echo 'frequently_size.draw LINE1'
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exit 0
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else
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echo 'max_size.value ' $MAX_SIZE
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echo 'size.value ' $SIZE
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echo 'min_size.value ' $MIN_SIZE
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echo 'target_size.value ' $TARGET_SIZE
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echo 'recently_size.value ' $MRU_SIZE
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echo 'frequently_size.value ' $MFU_SIZE
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fi
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}
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l2utilization() {
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if [ "$1" = "config" ]; then
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echo 'graph_title ZFS L2ARC Size'
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echo 'graph_args --base 1024 -r -l 0 --vertical-label Bytes'
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echo 'graph_vlabel Size in MB'
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echo 'graph_info This graph shows the L2ARC Size utilization'
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echo 'size.label Size'
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echo 'size.draw AREA'
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echo 'hdr_size.label Header Size'
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echo 'hdr_size.draw AREA'
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exit 0
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else
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echo 'size.value ' $L2_SIZE
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echo 'hdr_size.value ' $L2_HDR_SIZE
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fi
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}
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l2efficiency() {
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if [ "$1" = "config" ]; then
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echo 'graph_title ZFS L2ARC Efficiency'
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echo 'graph_args -u 100'
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echo 'graph_vlabel %'
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echo 'graph_info This graph shows the L2ARC Efficiency'
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echo 'l2_hits.label Hit Ratio'
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echo 'l2_misses.label Miss Ratio'
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else
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echo 'l2_hits.value ' $L2_HIT_RATIO_PERC
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echo 'l2_misses.value ' $L2_MISS_RATIO_PERC
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fi
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}
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[ "$1" = "config" ] && echo "graph_category zfs"
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case "$FUNCTION" in
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efficiency)
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efficiency $1
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;;
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cachehitlist)
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cachehitlist $1
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;;
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cachehitdtype)
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cachehitdtype $1
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;;
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dmuprefetch)
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dmuprefetch $1
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;;
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utilization)
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utilization $1
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;;
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l2utilization)
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l2utilization $1
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;;
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l2efficiency)
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l2efficiency $1
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;;
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esac
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