cpu和内存的使用率统计

统计cpu和内存一个月的平均使用率：

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#!/bin/bash

totalcpu_rate=0.0

totalmem_rate=0.0

num_days=$(ls -l /var/log/sa/sa[0-3]* | wc -l)

echo $num_days

for file in /var/log/sa/sa[0-3]*

do

    cpu_average=$(sar -f $file | grep Average | tail -n1 | awk '{printf("%.2f\n", (100-$NF))}')

    mem_average=$(sar -r -f $file | grep Average | tail -1 | awk '{printf("%.2f\n", $4)}')

    totalcpu_rate=$(echo "${cpu_average} + ${totalcpu_rate}" | bc)

    totalmem_rate=$(echo "${mem_average} + ${totalmem_rate}" | bc)

done

 

cpu_average=$(echo "scale=5; $totalcpu_rate/$num_days" | bc)

mem_average=$(echo "scale=5; $totalmem_rate/$num_days" | bc)

printf "%.2f%%, %.2f%%\n" $cpu_average $mem_average >> /tmp/hostinfo.csv

统计cpu和内存一个月的使用峰值：

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#!/bin/bash

cpu_min=100

mem_max=0

for file in /var/log/sa/sa[0-3]*

do

    _day_cpu_min=$(sar -f $file | awk 'BEGIN{min=100} {if(($NF ~ /^[1-9]/) && $NF< min) {min=$NF} fi} END{printf("%.2f\n", min)}')

    if [ $(echo "${_day_cpu_min} < ${cpu_min}" | bc) ]; then

        cpu_min=${_day_cpu_min}

    fi

    _day_mem_max=$(sar -r -f $file | awk 'BEGIN{max=0} {if((NF==12) && ($5 ~ /^[1-9]/) && $5>max) {max=$5} fi} END{printf("%.2f", max)}')

    if [ $(echo "${_day_mem_max} > ${mem_max}" | bc) ]; then

        mem_max=${_day_mem_max}

    fi

done

 

cpu_max=$(echo "100-${cpu_min}" | bc)

echo ${cpu_max}

echo ${mem_max}

 

printf "%.2f%%, %.2f%%\n" $cpu_max $mem_max >> /tmp/hostinfo.csv