统计平均值

cat access.log|grep '/testurl' |awk 'BEGIN{maxv=-1;minv=444}{if($3>maxv)maxv=$3;if($3<minv)minv=$3;count++;sum+=$3} END {print minv,maxv,"avg is ", sum/count}'

cat access.log|grep '/testurl' |awk '{count++;sum+=$3} END {print "avg is ", sum/count}'