这篇文章主要介绍“怎么用Shell脚本查看进程内存真实占用情况”，在日常操作中，相信很多人在怎么用Shell脚本查看进程内存真实占用情况问题上存在疑惑，小编查阅了各式资料，整理出简单好用的操作方法，希望对大家解答”怎么用Shell脚本查看进程内存真实占用情况”的疑惑有所帮助！接下来，请跟着小编一起来学习吧！
代码如下:
#!/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
到此，关于“怎么用Shell脚本查看进程内存真实占用情况”的学习就结束了，希望能够解决大家的疑惑。理论与实践的搭配能更好的帮助大家学习，快去试试吧！若想继续学习更多相关知识，请继续关注编程网网站，小编会继续努力为大家带来更多实用的文章！
