查看进程内存真实占用情况的脚本

#!/bin/bash
#****************************************************************#
# ScriptName: pm
# Author: osdba
# Create Date: 2010-01-31
# Modify Author:
# Modify Date: 2010-01-31
# Function: show processes memory used
#***************************************************************#


function getpidmem()
{
cat /proc/$1/smaps 2>/dev/null |awk  /
'BEGIN{
    total_size=0;
    total_rss=0;
    total_shared_clean=0;
    total_shared_dirty=0;
    total_private_clean=0;
    total_private_dirty=0;
    total_swap=0;
   
    mem_size=0;
    mem_rss=0;
    mem_shared_clean=0;
    mem_shared_dirty=0;
    mem_private_clean=0;
    mem_private_dirty=0;
    mem_swap=0;
}
{
    if($1 ~ /^Size:/)
    {
        mem_size=$2;
    }
    else if($1 ~ /^Rss:/)
    {
        mem_rss=$2;
    }
    else if($1 ~ /^Shared_Clean:/)
    {
        mem_shared_clean=$2;
    }
    else if($1 ~ /^Shared_Dirty:/)
    {
        mem_shared_dirty=$2;
    }
    else if($1 ~ /^Private_Clean:/)
    {
        mem_private_clean=$2;
    }
    else if($1 ~ /^Private_Dirty:/)
    {
        mem_private_dirty=$2;
    }
    else if($1 ~ /^Swap:/)
    {
        mem_swap=$2;
    }
    else
    {
        if(ipcmem_start==1)
        {
            ipc_size=mem_size;
            ipc_rss=mem_rss;
            ipc_shared_clean=mem_shared_clean;
            ipc_shared_dirty=mem_shared_dirty;
            ipc_private_clean=mem_private_clean;
            ipc_private_dirty=mem_private_dirty;
            ipc_swap=mem_swap;
        }
        else
        {
            total_size=total_size+mem_size;
            total_rss=total_rss+mem_rss;
            total_shared_clean=total_shared_clean+mem_shared_clean;
            total_shared_dirty=total_shared_dirty+mem_shared_dirty;
            total_private_clean=total_private_clean+mem_private_clean;
            total_private_dirty=total_private_dirty+mem_private_dirty;
            total_swap=total_swap+mem_swap;
        };
        if($6 ~ /^//SYSV/)
        {
            ipcmem_start=1;            
        }
        else
        {
            ipcmem_start=0;       
        };
    };
}
END{
    printf("%15d %15d %15d %15d %15d %15d/n",total_rss,total_private_clean,total_private_dirty,total_shared_clean,total_shared_dirty,total_swap);
}
'
}

function show_all_process_mem()
{
    TMPFILE=`/bin/mktemp -q`
    echo "   pid     RSS(KB)   PRIV_DIRTY PRIV_CLEAN SHR_DIRTY  SHR_CLEAN    SWAP     PAGETABLE      CMDLINE"
    echo "--------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ----------------"
    ls -ld /proc/[0-9]* |awk '{printf("%s/n",$NF)}' > $TMPFILE
    while read LINE
    do
        PID=`basename $LINE`
        cmdline=`ps -o command -p $PID |tail -1  |cut -b 1-26`
        pagetablesize=`cat /proc/$PID/status |grep "VmPTE:"|awk '{print $2}'`
        if [ "$pagetablesize" = "" ] ; then
            pagetablesize=0
        fi
       
        meminfoline=`getpidmem $PID`
        rss=`echo $meminfoline |awk '{print $1}'`
        private_clean=`echo $meminfoline |awk '{print $2}'`
        private_dirty=`echo $meminfoline |awk '{print $3}'`
        shared_dirty=`echo $meminfoline |awk '{print $4}'`
        shared_clean=`echo $meminfoline |awk '{print $5}'`
        swap=`echo $meminfoline |awk '{print $6}'`
        total_rss=$((total_rss+rss))
        total_private_clean=$((total_private_clean+private_clean))
        total_private_dirty=$((total_private_dirty+private_dirty))
        total_shared_dirty=$((total_shared_dirty+shared_dirty))
        total_shared_clean=$((total_rss+shared_clean))
        total_swap=$((total_swap+swap))
        total_pagetablesize=$((total_pagetablesize+pagetablesize))
        if [ "$1" = "-a" ] ;then
            echo $PID $meminfoline "$pagetablesize" "$cmdline"|awk /
            '{
              printf("%9d %10d %10d %10d %10d %10d %10d %10d %-26s/n",$1,$2,$3,$4,$5,$6,$7,$8,$9);
            }'
        fi
    done <$TMPFILE
    /bin/rm $TMPFILE

    echo $total_rss $total_private_clean $total_private_dirty $total_shared_dirty $total_shared_clean $total_swap $total_pagetablesize |awk /
    '{
        printf("   ALL    %10d %10d %10d %10d %10d %10d %10d/n",$1,$2,$3,$4,$5,$6,$7);
    }'
}


function print_usage()
{
    echo "usage:"
    echo "  pm.sh -a : display all process memory info"
    echo "  pm.sh -s : display total memory info"
    echo "  pm.sh -p <pid> : display pid memory info"
}

total_rss=0
total_private_clean=0
total_private_dirty=0
total_shared_dirty=0
total_shared_clean=0
total_swap=0
total_pagetablesize=0

if [ $# -lt 1 ];then
   print_usage;
   exit 1
fi

if [ "$1" = "-a" ];then
    show_all_process_mem $1;
    exit 0
fi
if [ "$1" = "-s" ];then
    show_all_process_mem $1;
    exit 0
fi

if [ "$1" = "-p" ];then
    if [ $# -ne 2 ];then
        print_usage;
        exit 1
    fi
   
    meminfoline=`getpidmem $2`
    cmdline=`ps -o command -p $2 |tail -1  |cut -b 1-26`
    pagetablesize=`cat /proc/$2/status |grep "VmPTE:"|awk '{print $2}'`
    if [ "$pagetablesize" = "" ]; then
        pagetablesize=0
    fi
       
    echo "   pid     RSS(KB)   PRIV_DIRTY PRIV_CLEAN SHR_DIRTY  SHR_CLEAN    SWAP     PAGETABLE     CMDLINE"
    echo "--------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ----------------"
    echo $2 $meminfoline "$pagetablesize" "$cmdline"|awk /
    '{
        printf("%9d %10d %10d %10d %10d %10d %10d %10d %-26s/n",$1,$2,$3,$4,$5,$6,$7,$8,$9);
    }'
    exit 0
fi