Centos环境自写脚本查看使用php或nginx占用内存

在CentOs6.4下，用root权限测试。

# cd ~    //进入home目录
# vim .bashrc            //编辑文件，把下面代码放入地址

mem ()
{
    top -n1 -b | head -n7 | sed '1,6d' && top -n1 -b | sed '1,7d' | grep --color=auto $;
    ps aux | grep --color=auto $ | grep --color=auto -v grep | awk -F " " '{ sum += $6 } END { printf "Total Memory Usage: %.1f MB\n", sum/1024 }'
}

# source .bashrc   //使命令生效

测试

~查看PHP或者nginx的占用内存~

[root@bogon ~]# mem php
  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
 root           336m   S  0.0  0.8   :00.03 php-fpm
 www            336m   S  0.0  0.8   :00.01 php-fpm
 www            336m   S  0.0  0.8   :00.01 php-fpm
 www            336m   S  0.0  0.8   :00.05 php-fpm
 www            336m   S  0.0  0.8   :00.03 php-fpm
 www            336m   S  0.0  0.8   :00.00 php-fpm
 www            336m   S  0.0  0.8   :00.01 php-fpm
 www            336m  78m  71m S  0.0  7.9   :07.50 php-fpm
 www            336m   S  0.0  0.8   :00.04 php-fpm
 www            336m  77m  70m S  0.0  7.8   :09.19 php-fpm
 www            340m  84m  74m S  0.0  8.6   :07.78 php-fpm
Total Memory Usage: 301.4 MB

[root@bogon ~]# mem nginx
  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
  root              S  0.0  0.3   :00.01 nginx
  www             27m  S  0.0  2.8   :00.99 nginx
  www             22m  S  0.0  2.3   :00.46 nginx
  www             29m  S  0.0  3.0   :02.92 nginx
  www             29m  S  0.0  3.0   :11.48 nginx
Total Memory Usage: 111.2 MB