监控某个进程的cpu开销，监控每秒cpu占用最高的Pid ，监控top信息脚本

监控某个进程的cpu开销
#!/bin/bash
PID=5586
FileName="res.txt"
echo -en "%CPU\t%MEM\t$PID" > $FileName
for (( i = 0; i < 30; i++ )) do
    ttime=`date +"%m-%d %H:%M:%S"`
    output=`top -n 1 -p $PID > tmp`
    res=`gawk '{if (NR == 8) { printf "%d\t%d", $10, $11 } }' tmp`
    echo -en "$res\t$ttime\n" >> $FileName
    sleep 1
done

监控每秒cpu占用最高的Pid  vi a.sh
#!/bin/bash
FileName="res.txt"
echo -en "%CPU\t%MEM\t%PID\t%TIME" > $FileName
for (( i = 0; i < 30; i++ )) do
    ttime=`date +"%m-%d %H:%M:%S"`
    output=`top -i -b -n 1  > tmp`
    res=`gawk '{if (NR == 8 && $9>1) { printf "%d\t%d\t%d", $9, $10,$1 } }' tmp`
    if [ -n "$res" ] ; then
        echo -en "$res\t$ttime\n" >> $FileName
    fi
    sleep 1
done

然后用nohup sh a.sh &