zipio.sh

#!/bin/bash
loadthreashold=1.0
ioprocthreshold=40.0
ioprocthreset=05.00
cpuprocthreashold=20.0
cpuprocreset=05.0
reniceto=10

declare -A ionicedprocesses
declare -A renicedprocesses



float_cp () {
    #IFS=" "
    float1=( ${1/./ } )
    float2=( ${2/./ } )
    while [[ ${#float2[1]} -lt ${#float1[1]} ]]
    do
        float2[1]+="0"
    done
    while [[ ${#float2[1]} -gt ${#float1[1]} ]]
    do
        float1[1]+="0"
    done
    if [[ ${float1[0]} -gt ${float2[0]} || (${float1[0]} -eq ${float2[0]} && ${float1[1]} -gt ${float2[1]}) ]]; then
        fcp=1
    elif [[ ${float1[0]} -eq ${float2[0]} && ${float1[1]} -eq ${float2[1]} ]]; then
        fcp=0
    else
        fcp=-1
    fi
}

while true
do
    readarray -d ' ' -t i < /proc/loadavg
    echo ${i[2]}
    float_cp ${i[2]} $loadthreasholdv
    if [[ $fcp -gt 0 ]]
    then
        echo "Load exceeds threshold of $loadthreashold"
        readarray -d $'\n' -t i <<< $(./iotop -P -b -q -o -n 2 -d 0.1)
        for j in  "${i[@]}"
        do
            IFS=$' ' GLOBIGNORE='*' command eval 'k=($j)'
            if [[ ${k[0]:0:1} = [0-9] ]]
            then
                float_cp ${k[9]} $ioprocthreshold
                if [[ $fcp -gt 0 && ${k[1]} = "be/"[0-9] ]] #was be/0 so I need to look at be states
                then
                    ionice -c 3 -t -p ${k[0]}
                    ionicedprocesses[${k[0]}]=${k[0]}
                    echo "process ${k[0]} \"${k[9]}\" reniced to idle as it was hogging io"
                fi
            else
                float_cp ${k[9]} $ioprocthreshold
                if [[  $fcp -lt 0 && ${ionicedprocesses[${k[0]}]} = ${k[0]} ]]
                then
                    ionice -c 2 -n 4 -t -p ${k[0]}
                    echo "process ${k[0]} \"${k[9]}\" reniced to be/4 as it stopped hogging io"
                    unset ionicedprocesses[${k[0]}]
                fi
            fi
        done
        readarray -d $'\n' -t i <<< $(top -b -d 0.1 -n 1)
        for j in  "${i[@]}"
        do
            k=( ${j/ / } )
            if [[ ${k[0]:0:1} = [0-9] ]]
            then
                float_cp ${k[8]} $cpuprocthreashold
                fcp=0
                if [[ $fcp -gt 0 && ${k[3]} = "0" ]] #was be/0 so I need to look at be states
                then
                    renice -n $reniceto -p ${k[0]}
                    echo "process ${k[0]} \"${k[8]}\"reniced to $reniceto as it was hogging cpu"
                    renicedprocesses[${k[0]}]=${k[0]}
                else
                    float_cp ${k[8]} $cpuprocthreashold
                    if [[ $fcp -lt 0 && ${renicedprocesses[${k[0]}]} = ${k[0]} ]]
                    then
                        renice -n 0 -p ${k[0]}
                        echo "process ${k[0]} reniced to 0 as it stopped hogging cpu"
                       unset renicedprocesses[${k[0]}]
                    fi
                fi
            fi
        done
    fi
    sleep 2
done