Add getzfsarccache.sh

getzfsarccache.sh

@@ -0,0 +1,46 @@
+#!/bin/bash
+intv="$1"
+
+if [ -z $intv ]
+then
+    intv=5
+fi
+
+prevhits=0
+prevmisses=0
+
+i=0
+
+while true
+do
+
+    stats=`cat /proc/spl/kstat/zfs/arcstats`
+    hit=`echo "$stats"  | grep -w hits | awk '{ print $3}'`
+    miss=`echo "$stats"  | grep -w misses | awk '{ print $3}'`
+
+
+    hitrate=$(((hit-prevhits)/intv))
+    missrate=$(((miss-prevmisses)/intv))
+
+    prevhits=$hit
+    prevmisses=$miss
+
+    req=$((hitrate+missrate))
+
+    if [ "$hitrate" != 0 ] && [ "$req" != 0 ]
+    then
+        hitper=`echo "scale=2; (($hitrate / $req) * 100)" | bc`
+    else
+        hitper=0
+    fi
+
+    if [ "$i" -gt 0 ]
+    then
+        echo "IOPs: $req | ARC cache hit ratio: $hitper % | Hitrate: $hitrate / Missrate: $missrate"
+    else
+        echo "Loading"
+    fi
+
+    ((i++))
+    sleep $intv
+done