Re: monitorare utilizzo di RAM

[Piviul <piviul@riminilug.it>]

Mille grazie a tutti quanti; se qualcuno fosse interessato posto lo script:

#!/bin/bash

pname=dar
logger=$(which logger)
[ -z $logger ] && echo "E: logger not found" && exit 1
logger="$logger -t $(basename $0 .sh)"
while [ 1 = 1 ]; do
    pid=$(pidof $pname | cut -f1 -d\ )
    maxram=0
    if [ -n "$pid" ]; then
        $logger "I find a process with name $pname (pid $pid): I begin
to monitor the max RAM used by the process"
        while [ "$(pidof $pname)" = "$pid" ]; do
            str="[[:space:]]*[^[:space:]]*"

            cmd="ps aux -p $pid | tail -n1 | sed 's/^"
            for i in {1..4}; do cmd=$cmd$str; done # I skip first 4
(USER,PID,%CPU,%MEM,VSZ)
            cmd="$cmd[[:space:]]*\([^[:space:]]*\).*$/\1/'"
            curram=$(eval $cmd)
            # echo "$(date --rfc-3339=seconds) ($pid): $curram"

            if [ -z "$(echo $curram | grep ^[0-9]*$)" ]; then
                $logger "E: error finding the RAM amount used by $pname:
$curram doesn't seems to be numeric"
            elif [ $curram -gt $maxram ]; then
               maxram=$curram
            fi
            sleep 1
        done
        $logger "the process $pname ($pid) has used $maxram Kib"
    fi
    sleep 10
done