grep VmPeak /proc/$PID/status

(将$PID更改为您正在寻找的实际进程ID).

VmPeak是进程自启动以来使用的最大内存量.

为了跟踪进程的内存使用情况,您可以使用名为munin的工具进行跟踪,并向您显示内存使用情况随时间变化的精确图表.

Munin附带了许多用于跟踪系统资源的默认插件,但它没有附带跟踪Peak内存使用的插件 – 幸运的是,它非常容易为它编写插件.

这是一个munin插件的示例,用于跟踪apache进程的VmPeak,VmRSS和VmSize内存使用情况.您可以根据需要进行更改(只需指向正确的PID文件并根据需要更改组件名称).

它输出的图形看起来像这样(VmPeak和VmSize在这个例子中是相同的,所以你只看到其中一个)：

注意：这仅监视主apache进程,并且不显示其子进程的内存使用情况.

#!/bin/bash
#
# Parameters:
#
#       config   (required)
#       autoconf (optional - used by munin-config)
#

COMPONENT_NAME="Apache"
COMPONENT_PID_FILE="/var/run/apache2.pid"

if [ "$1" = "autoconf" ]; then
        if [ -r /proc/stat ]; then
                echo yes
                exit 0
        else
                echo "no (/proc/stat not readable)"
                exit 1
        fi
fi

if [ "$1" = "config" ]; then   
        echo "graph_title $COMPONENT_NAME memory usage"
        echo 'graph_vlabel'
        echo "graph_category Processes"
        echo "graph_info This graph shows the amount of memory used by the $COMPONENT_NAME processes"
        echo "${COMPONENT_NAME}_vmpeak.label $COMPONENT_NAME VmPeak"
        echo "${COMPONENT_NAME}_vmsize.label $COMPONENT_NAME VmSize"
        echo "${COMPONENT_NAME}_vmRSS.label $COMPONENT_NAME VmRSS"
        echo 'graph_args --base 1024'
        exit 0
fi

check_memory ()
# $1 - PID location
# $2 - process_label
{
        pid_location=$1
        process_label=$2
        read pid < $pid_location
        procpath="/proc/$pid/status"
        if [ ! -e $procpath ]  || [ -z $pid ]
        then
                echo "${process_label}_vmpeak.value 0"
                echo "${process_label}_vmsize.value 0"
                echo "${process_label}_vmRSS.value 0"
                exit 0
        fi

        VmPeak=`grep VmPeak /proc/$pid/status|awk '{print $2}'`
        VmSize=`grep VmSize /proc/$pid/status|awk '{print $2}'`
        VmRSS=`grep VmRSS /proc/$pid/status|awk '{print $2}'`

        echo "${process_label}_vmpeak.value $(( $VmPeak * 1024 ))"
        echo "${process_label}_vmsize.value $(( $VmSize * 1024 ))"
        echo "${process_label}_vmRSS.value $(( $VmRSS * 1024 ))"
}

check_memory $COMPONENT_PID_FILE $COMPONENT_NAME