root / plugins / zfs / zfsonlinux_stats_ @ e3842681
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#!/usr/bin/env bash |
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# ZFS statistics for ZFSonLinux |
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# Author: Adam Michel (elfurbe@furbism.com) |
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# |
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# Description: |
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# This is a modification of the zfs_stats |
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# plugin by David Bjornsson (which was a |
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# rewrite of zfs-stats-for-freebsd scripts |
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# by patpro) modified to work with ZFSonLinux. |
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# |
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# Tested on Ubuntu-14.04 |
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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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|
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FUNCTION=$(basename $0 | cut -d_ -f3) |
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MEMMAX=`cat /proc/meminfo | grep MemTotal | awk '{print $2}'`
|
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BC='/usr/bin/bc -q' |
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ARCSTATS="/proc/spl/kstat/zfs/arcstats" |
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ZFETCHSTATS="/proc/spl/kstat/zfs/zfetchstats" |
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|
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# |
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# Pull all values from arcstats |
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# |
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|
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while read name type data |
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do |
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[[ $name =~ ^[0-9].* ]] && continue |
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[[ $name == "name" ]] && continue |
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[[ $name == "" ]] && continue |
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case $name in |
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"hits" ) |
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export ARC_HITS=$data |
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;; |
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"misses" ) |
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export ARC_MISSES=$data |
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;; |
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"p" ) |
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export MRU_SIZE=$data |
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;; |
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"c_max" ) |
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export MAX_SIZE=$data |
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;; |
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"c_min" ) |
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export MIN_SIZE=$data |
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;; |
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"c" ) |
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export TARGET_SIZE=$data |
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;; |
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* ) |
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VARNAME=`echo $name | tr '[:lower:]' '[:upper:]'` |
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#declare $VARNAME=$data |
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export $VARNAME=$data |
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;; |
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esac |
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done < $ARCSTATS |
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|
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# |
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# Pull all values from zfetchstats |
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# |
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|
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while read name type data |
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do |
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[[ $name =~ ^[0-9].* ]] && continue |
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[[ $name == "name" ]] && continue |
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case $name in |
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"hits" ) |
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export DMU_HITS=$data |
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;; |
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"misses" ) |
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export DMU_MISSES=$data |
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;; |
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* ) |
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VARNAME=`echo $name | tr '[:lower:]' '[:upper:]'` |
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export $VARNAME=$data |
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;; |
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esac |
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done < $ZFETCHSTATS |
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|
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# |
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# Calculation macros |
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# |
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|
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ANON_HITS=`echo "$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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|
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if [ $ARC_ACCESSES_TOTAL != 0 ]; then |
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CACHE_HIT_RATIO_PERC=`echo "scale=2 ; (100*$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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else |
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CACHE_HIT_RATIO_PERC=0 |
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CACHE_MISS_RATIO_PERC=0 |
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ACTUAL_HIT_RATIO_PERC=0 |
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fi |
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|
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if [ $DEMAND_DATA_TOTAL != 0 ]; then DATA_DEMAND_EFFICIENCY_PERC=`echo "scale=2 ; (100*$DEMAND_DATA_HITS/$DEMAND_DATA_TOTAL)" | $BC`; else DATA_DEMAND_EFFICIENCY_PERC=0; fi |
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if [ $PREFETCH_DATA_TOTAL != 0 ]; then DATA_PREFETCH_EFFICENCY_PERC=`echo "scale=2 ; (100*$PREFETCH_DATA_HITS/$PREFETCH_DATA_TOTAL)" | $BC`; else DATA_PREFETCH_EFFICENCY_PERC=0; fi |
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|
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if [ $ARC_HITS != 0 ]; then |
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ANONYMOUSLY_USED_PERC=`echo "scale=2 ; (100*$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)" | $BC` |
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|
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DEMAND_DATA_HIT_PERC=`echo "scale=2 ; (100*$DEMAND_DATA_HITS/$ARC_HITS)" | $BC` |
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PREFETCH_DATA_HIT_PERC=`echo "scale=2 ; (100*$PREFETCH_DATA_HITS/$ARC_HITS)" | $BC` |
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DEMAND_METADATA_HIT_PERC=`echo "scale=2 ; (100*$DEMAND_METADATA_HITS/$ARC_HITS)" | $BC` |
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PREFETCH_METADATA_HIT_PERC=`echo "scale=2 ; (100*$PREFETCH_METADATA_HITS/$ARC_HITS)" | $BC` |
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else |
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ANONYMOUSLY_USED_PERC=0 |
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MOST_RECENTLY_USED_PERC=0 |
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MOST_FREQUENTLY_USED_PERC=0 |
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MOST_RECENTLY_USED_GHOST_PERC=0 |
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MOST_FREQUENTLY_USED_GHOST_PERC=0 |
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|
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DEMAND_DATA_HIT_PERC=0 |
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PREFETCH_DATA_HIT_PERC=0 |
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DEMAND_METADATA_HIT_PERC=0 |
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PREFETCH_METADATA_HIT_PERC=0 |
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fi |
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|
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if [ $ARC_MISSES != 0 ]; then |
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PREFETCH_METADATA_MISSES_PERC=`echo "scale=2 ; (100*$PREFETCH_METADATA_MISSES/$ARC_MISSES)" | $BC` |
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DEMAND_DATA_MISS_PERC=`echo "scale=2 ; (100*$DEMAND_DATA_MISSES/$ARC_MISSES)" | $BC` |
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PREFETCH_DATA_MISS_PERC=`echo "scale=2 ; (100*$PREFETCH_DATA_MISSES/$ARC_MISSES)" | $BC` |
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DEMAND_METADATA_MISS_PERC=`echo "scale=2 ; (100*$DEMAND_METADATA_MISSES/$ARC_MISSES)" | $BC` |
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else |
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PREFETCH_METADATA_MISSES_PERC=0 |
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DEMAND_DATA_MISS_PERC=0 |
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PREFETCH_DATA_MISS_PERC=0 |
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DEMAND_METADATA_MISS_PERC=0 |
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fi |
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|
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DMU_TOTAL=`echo "$DMU_HITS+$DMU_MISSES" | $BC` |
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if [ $DMU_TOTAL != 0 ]; then |
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DMU_HITS_PERC=`echo "scale=2 ; (100*$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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else |
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DMU_HITS_PERC=0 |
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DMU_MISSES_PERC=0 |
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fi |
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|
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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" | $BC` |
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fi |
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|
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L2_ACCESSES_TOTAL=`echo "$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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else |
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L2_HIT_RATIO_PERC=0 |
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L2_MISS_RATIO_PERC=0 |
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fi |
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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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echo 'hits.label Hit Ratio' |
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echo 'misses.label Miss Ratio' |
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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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} |
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|
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[ "$1" = "config" ] && echo "graph_category fs" |
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|
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case "$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 |