Shell脚本查看进程内存真实占用情况


#!/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