linux根据进程名查看其占用的内存

ps --no-headers -o "rss,cmd" -C nginx | awk '{ sum+=$1 } END { printf ("%d%s\n", sum/NR/1024,"M") }'

查看同名进程个数
ps -ef |grep "php-fpm"|grep "pool"|wc -l

https://segmentfault.com/a/1190000015920273