CPU监控脚本不正确地触发

Question

我想知道如果任何人都可以使用的原因，这有助于无法触发正确

HOSTNAME=`hostname -s` 
LOAD=25.00 
CAT=/bin/cat 
MAILFILE=/home/jboss/monitor.mail 
MAILER=/bin/mail 
mailto="[email protected]" 
CPU_LOAD=`sar -P ALL 1 10 |grep 'Average.*all' |awk -F" " '{print 100.0 -$NF}'` 
if [[ $CPU_LOAD > $LOAD ]]; 
then 
PROC=`ps -eo pcpu,pid -o comm= | sort -k1 -n -r | head -1` 
echo -e "Please check processes on ${HOSTNAME} the value of cpu load is $CPU_LOAD%. 
Highest process is: $PROC" > $MAILFILE 
$CAT $MAILFILE | $MAILER -s "CPU Load is on ${HOSTNAME} is $CPU_LOAD %" $mailto 
fi 

这似乎为特区和PS但是我仍然得到警报正常工作通过电子邮件发送CPU负载为3.18％。除非我失去了一些东西，否则它不应该触发，除非负载大于25％。

看来虽然它更多的是如果负载大于2.5％的任何建议吗？

谢谢

Answer 1

猛砸只处理整数，因此用更高的精度，你可以做这样的事情：

cpu_limit=25 
# read the 5min load-average straight from the special file on /proc 
read -r _ load_avg _ </proc/loadavg 
# multiply by 100 for precision 
load_avg=$(bc <<<"scale=0; $load_avg * 100/1") 
# compare numbers with (()) instead 
if ((load_avg > cpu_limit)); then 
    ... 
fi 

Answer 2

试试这个代码 - （测试 - 工作的罚款）

$ cat f.sh 
HOSTNAME=$(hostname -s) 
LOAD=25.00 
MAILFILE=$HOME/a.txt 
MAILER=/bin/mailx 
mailto="[email protected]" 
CPU_LOAD=$(sar -P ALL 1 10 |grep 'Average.*all' |awk -F" " '{print 100.0 -$NF}') 
if [[ $CPU_LOAD > $LOAD ]];then 
{ 
PROC=$(ps -eo pcpu,pid -o comm= | sort -k1 -n -r | head -1) 
echo -e "Please check processes on ${HOSTNAME} the value of cpu load is $CPU_LOAD%. 
Highest process is: $PROC" > $MAILFILE 
cat $MAILFILE | $MAILER -s "CPU Load is on ${HOSTNAME} is $CPU_LOAD %" $mailto 
} 
fi