#!/bin/sh # ZFS statistics for FreeBSD # Author: David Bjornsson # # Description: # This is a rewrite of the zfs-stats-for-freebsd # scripts by patpro. Rather then pulling the # information from the zfs-stats utility, it # pulls it straight from sysctl. # # Tested on FreeBSD 9.0-RELEASE # # Usage: zfs_stats_FUNCTION # # Available functions: # efficiency - ARC efficiency # cachehitlist - Cache hit by cache list # cachehitdtype - Cache hit by data type # dmuprefetch - DMU prefetch # utilization - ARC size breakdown # l2utilization - L2ARC size breakdown # l2efficiency - L2ARC efficiency # #%# family=auto FUNCTION=$(basename $0 | cut -d_ -f3) PAGESIZE=`/sbin/sysctl -n vm.stats.vm.v_page_size` MEMSIZE=`/sbin/sysctl -n vm.stats.vm.v_page_count` MEMMAX=`echo 'scale=2;' $PAGESIZE*$MEMSIZE | /usr/bin/bc -q` BC='/usr/bin/bc -q' SYS='/sbin/sysctl -n' # # Sysctl macros # ARC_HITS=`$SYS kstat.zfs.misc.arcstats.hits` ARC_MISSES=`$SYS kstat.zfs.misc.arcstats.misses` DEMAND_DATA_HITS=`$SYS kstat.zfs.misc.arcstats.demand_data_hits` DEMAND_DATA_MISSES=`$SYS kstat.zfs.misc.arcstats.demand_data_misses` DEMAND_METADATA_HITS=`$SYS kstat.zfs.misc.arcstats.demand_metadata_hits` DEMAND_METADATA_MISSES=`$SYS kstat.zfs.misc.arcstats.demand_metadata_misses` MFU_GHOST_HITS=`$SYS kstat.zfs.misc.arcstats.mfu_ghost_hits` MFU_HITS=`$SYS kstat.zfs.misc.arcstats.mfu_hits` MRU_GHOST_HITS=`$SYS kstat.zfs.misc.arcstats.mru_ghost_hits` MRU_HITS=`$SYS kstat.zfs.misc.arcstats.mru_hits` PREFETCH_DATA_HITS=`$SYS kstat.zfs.misc.arcstats.prefetch_data_hits` PREFETCH_DATA_MISSES=`$SYS kstat.zfs.misc.arcstats.prefetch_data_misses` PREFETCH_METADATA_HITS=`$SYS kstat.zfs.misc.arcstats.prefetch_metadata_hits` PREFETCH_METADATA_MISSES=`$SYS kstat.zfs.misc.arcstats.prefetch_metadata_misses` DMU_HITS=`$SYS kstat.zfs.misc.zfetchstats.hits` DMU_MISSES=`$SYS kstat.zfs.misc.zfetchstats.misses` SIZE=`$SYS kstat.zfs.misc.arcstats.size` MRU_SIZE=`$SYS kstat.zfs.misc.arcstats.p` MAX_SIZE=`$SYS kstat.zfs.misc.arcstats.c_max` MIN_SIZE=`$SYS kstat.zfs.misc.arcstats.c_min` TARGET_SIZE=`$SYS kstat.zfs.misc.arcstats.c` L2_SIZE=`$SYS kstat.zfs.misc.arcstats.l2_size` L2_HDR_SIZE=`$SYS kstat.zfs.misc.arcstats.l2_hdr_size` L2_HITS=`$SYS kstat.zfs.misc.arcstats.l2_hits` L2_MISSES=`$SYS kstat.zfs.misc.arcstats.l2_misses` # # Calculation macros # ANON_HITS=`echo "$ARC_HITS-($MFU_HITS+$MRU_HITS+$MFU_GHOST_HITS+$MRU_GHOST_HITS)" | $BC` ARC_ACCESSES_TOTAL=`echo "$ARC_HITS+$ARC_MISSES" | $BC` DEMAND_DATA_TOTAL=`echo "$DEMAND_DATA_HITS+$DEMAND_DATA_MISSES" | $BC` PREFETCH_DATA_TOTAL=`echo "$PREFETCH_DATA_HITS+$PREFETCH_DATA_MISSES" | $BC` REAL_HITS=`echo "$MFU_HITS+$MRU_HITS" | $BC` CACHE_HIT_RATIO_PERC=`echo "scale=2 ; (100*$ARC_HITS/$ARC_ACCESSES_TOTAL)" | $BC` CACHE_MISS_RATIO_PERC=`echo "scale=2 ; (100*$ARC_MISSES/$ARC_ACCESSES_TOTAL)" | $BC` ACTUAL_HIT_RATIO_PERC=`echo "scale=2 ; (100*$REAL_HITS/$ARC_ACCESSES_TOTAL)" | $BC` DATA_DEMAND_EFFICIENCY_PERC=`echo "scale=2 ; (100*$DEMAND_DATA_HITS/$DEMAND_DATA_TOTAL)" | $BC` DATA_PREFETCH_EFFICENCY_PERC=`echo "scale=2 ; (100*$PREFETCH_DATA_HITS/$PREFETCH_DATA_TOTAL)" | $BC` ANONYMOUSLY_USED_PERC=`echo "scale=2 ; (100*$ANON_HITS/$ARC_HITS)" | $BC` MOST_RECENTLY_USED_PERC=`echo "scale=2 ; (100*$MRU_HITS/$ARC_HITS)" | $BC` MOST_FREQUENTLY_USED_PERC=`echo "scale=2 ; (100*$MFU_HITS/$ARC_HITS)" | $BC` MOST_RECENTLY_USED_GHOST_PERC=`echo "scale=2 ; (100*$MRU_GHOST_HITS/$ARC_HITS)" | $BC` MOST_FREQUENTLY_USED_GHOST_PERC=`echo "scale=2 ; (100*$MFU_GHOST_HITS/$ARC_HITS)" | $BC` DEMAND_DATA_HIT_PERC=`echo "scale=2 ; (100*$DEMAND_DATA_HITS/$ARC_HITS)" | $BC` DEMAND_DATA_MISS_PERC=`echo "scale=2 ; (100*$DEMAND_DATA_MISSES/$ARC_MISSES)" | $BC` PREFETCH_DATA_HIT_PERC=`echo "scale=2 ; (100*$PREFETCH_DATA_HITS/$ARC_HITS)" | $BC` PREFETCH_DATA_MISS_PERC=`echo "scale=2 ; (100*$PREFETCH_DATA_MISSES/$ARC_MISSES)" | $BC` DEMAND_METADATA_HIT_PERC=`echo "scale=2 ; (100*$DEMAND_METADATA_HITS/$ARC_HITS)" | $BC` DEMAND_METADATA_MISS_PERC=`echo "scale=2 ; (100*$DEMAND_METADATA_MISSES/$ARC_MISSES)" | $BC` PREFETCH_METADATA_HIT_PERC=`echo "scale=2 ; (100*$PREFETCH_METADATA_HITS/$ARC_HITS)" | $BC` PREFETCH_METADATA_MISSES_PERC=`echo "scale=2 ; (100*$PREFETCH_METADATA_MISSES/$ARC_MISSES)" | $BC` DMU_TOTAL=`echo "$DMU_HITS+$DMU_MISSES" | $BC` DMU_HITS_PERC=`echo "scale=2 ; (100*$DMU_HITS/$DMU_TOTAL)" | $BC` DMU_MISSES_PERC=`echo "scale=2 ; (100*$DMU_MISSES/$DMU_TOTAL)" | $BC` if [ $SIZE -gt $TARGET_SIZE ]; then MFU_SIZE=`echo "$SIZE-$MRU_SIZE" | $BC` else MFU_SIZE=`echo "$TARGET_SIZE-$MRU_SIZE" | $BC` fi L2_ACCESSES_TOTAL=`echo "$L2_HITS+$L2_MISSES" | $BC` if [ $L2_ACCESSES_TOTAL -gt 0 ]; then L2_HIT_RATIO_PERC=`echo "scale=2 ; (100*$L2_HITS/$L2_ACCESSES_TOTAL)" | $BC` L2_MISS_RATIO_PERC=`echo "scale=2 ; (100*$L2_MISSES/$L2_ACCESSES_TOTAL)" | $BC` fi efficiency() { if [ "$1" = "config" ]; then echo 'graph_title ZFS ARC Efficiency' echo 'graph_args -u 100' echo 'graph_vlabel %' echo 'graph_info This graph shows the ARC Efficiency' echo 'hits.label Hit Ratio' echo 'misses.label Miss Ratio' echo 'actual_hits.label Actual Hit Ratio' echo 'data_demand_efficiency.label Data Demand Efficiency' echo 'data_prefetch_efficiency.label Data Prefetch Efficiency' exit 0 else echo 'hits.value ' $CACHE_HIT_RATIO_PERC echo 'misses.value ' $CACHE_MISS_RATIO_PERC echo 'actual_hits.value ' $ACTUAL_HIT_RATIO_PERC echo 'data_demand_efficiency.value ' $DATA_DEMAND_EFFICIENCY_PERC echo 'data_prefetch_efficiency.value ' $DATA_PREFETCH_EFFICENCY_PERC fi } cachehitlist() { if [ "$1" = "config" ]; then echo 'graph_title ZFS ARC Efficiency: Cache hits by cache list' echo 'graph_args -u 100' echo 'graph_vlabel %' echo 'graph_info This graph shows the ARC Efficiency' echo 'cache_list_anon.label Anonymously Used' echo 'cache_list_most_rec.label Most Recently Used' echo 'cache_list_most_freq.label Most Frequently Used' echo 'cache_list_most_rec_ghost.label Most Recently Used Ghost' echo 'cache_list_most_freq_ghost.label Most Frequently Used Ghost' exit 0 else echo 'cache_list_anon.value ' $ANONYMOUSLY_USED_PERC echo 'cache_list_most_rec.value ' $MOST_RECENTLY_USED_PERC echo 'cache_list_most_freq.value ' $MOST_FREQUENTLY_USED_PERC echo 'cache_list_most_rec_ghost.value ' $MOST_RECENTLY_USED_GHOST_PERC echo 'cache_list_most_freq_ghost.value ' $MOST_FREQUENTLY_USED_GHOST_PERC fi } cachehitdtype() { if [ "$1" = "config" ]; then echo 'graph_title ZFS ARC Efficiency: Cache hits by data type' echo 'graph_args -u 100' echo 'graph_vlabel %' echo 'graph_info This graph shows the ARC Efficiency' echo 'data_type_demand_hits.label Demand Data Hit Ratio' echo 'data_type_demand_misses.label Demand Data Miss Ratio' echo 'data_type_prefetch_hits.label Prefetch Data Hit Ratio' echo 'data_type_prefetch_misses.label Prefetch Data Miss Ratio' echo 'data_type_demand_metadata_hits.label Demand Metadata Hit Ratio' echo 'data_type_demand_metadata_misses.label Demand Metadata Miss Ratio' echo 'data_type_prefetch_metadata_hits.label Prefetch Metadata Hit Ratio' echo 'data_type_prefetch_metadata_misses.label Prefetch Metadata Miss Ratio' exit 0 else echo 'data_type_demand_hits.value ' $DEMAND_DATA_HIT_PERC echo 'data_type_demand_misses.value ' $DEMAND_DATA_MISS_PERC echo 'data_type_prefetch_hits.value ' $PREFETCH_DATA_HIT_PERC echo 'data_type_prefetch_misses.value ' $PREFETCH_DATA_MISS_PERC echo 'data_type_demand_metadata_hits.value ' $DEMAND_METADATA_HIT_PERC echo 'data_type_demand_metadata_misses.value ' $DEMAND_METADATA_MISS_PERC echo 'data_type_prefetch_metadata_hits.value ' $PREFETCH_METADATA_HIT_PERC echo 'data_type_prefetch_metadata_misses.value ' $PREFETCH_METADATA_MISSES_PERC fi } dmuprefetch() { if [ "$1" = "config" ]; then echo 'graph_title ZFS DMU prefetch stats' echo 'graph_args -u 100' echo 'graph_vlabel %' echo 'graph_info This graph shows the DMU prefetch stats' echo 'hits.label Hit Ratio' echo 'misses.label Miss Ratio' exit 0 else echo 'hits.value ' $DMU_HITS_PERC echo 'misses.value ' $DMU_MISSES_PERC fi } utilization() { if [ "$1" = "config" ]; then echo 'graph_title ZFS ARC Size' echo 'graph_args --base 1024 -l 0 --vertical-label Bytes --upper-limit '$MEMMAX echo 'graph_vlabel Size in MB' echo 'graph_info This graph shows the ARC Size utilization' echo 'max_size.label Maximum Size' echo 'max_size.draw AREA' echo 'size.label Size' echo 'size.draw AREA' echo 'min_size.label Minimum Size' echo 'min_size.draw AREA' echo 'target_size.label Target Size' echo 'target_size.draw LINE1' echo 'recently_size.label Recently Used Cache Size' echo 'recently_size.draw LINE1' echo 'frequently_size.label Frequently Used Cache Size' echo 'frequently_size.draw LINE1' exit 0 else echo 'max_size.value ' $MAX_SIZE echo 'size.value ' $SIZE echo 'min_size.value ' $MIN_SIZE echo 'target_size.value ' $TARGET_SIZE echo 'recently_size.value ' $MRU_SIZE echo 'frequently_size.value ' $MFU_SIZE fi } l2utilization() { if [ "$1" = "config" ]; then echo 'graph_title ZFS L2ARC Size' echo 'graph_args --base 1024 -r -l 0 --vertical-label Bytes' echo 'graph_vlabel Size in MB' echo 'graph_info This graph shows the L2ARC Size utilization' echo 'size.label Size' echo 'size.draw AREA' echo 'hdr_size.label Header Size' echo 'hdr_size.draw AREA' exit 0 else echo 'size.value ' $L2_SIZE echo 'hdr_size.value ' $L2_HDR_SIZE fi } l2efficiency() { if [ "$1" = "config" ]; then echo 'graph_title ZFS L2ARC Efficiency' echo 'graph_args -u 100' echo 'graph_vlabel %' echo 'graph_info This graph shows the L2ARC Efficiency' echo 'l2_hits.label Hit Ratio' echo 'l2_misses.label Miss Ratio' else echo 'l2_hits.value ' $L2_HIT_RATIO_PERC echo 'l2_misses.value ' $L2_MISS_RATIO_PERC fi } [ "$1" = "config" ] && echo "graph_category disk" case "$FUNCTION" in efficiency) efficiency $1 ;; cachehitlist) cachehitlist $1 ;; cachehitdtype) cachehitdtype $1 ;; dmuprefetch) dmuprefetch $1 ;; utilization) utilization $1 ;; l2utilization) l2utilization $1 ;; l2efficiency) l2efficiency $1 ;; esac