ruby on rails - How to detect how many active Unicorn workers are busy? -

i using ruby unicorn, , have configured have 15 worker processes.

how tell how many workers processing work (are not idle, waiting work) @ current time?

if need infomation on command line, check how cpu each using:

ps aux --sort=-pcpu | grep '%cpu\|unicorn' 

ps aux --sort=-pcpu - gets list of processes running, sorted in cpu usage order reversed (highest cpu first)

| - pipes output of previous command next

grep '%cpu\|unicorn' - returns lines contain %cpu (the first line) or unicorn. \| or symbol in grep pattern.

you should output this, cpu usage in 3rd column, memory usage in 4th:

user       pid %cpu %mem    vsz   rss tty   stat start   time  command   vagrant   4444  33.2 45.0 349988 152892 ?   sl   13:43   0:03 unicorn master -c /vagrant/config/unicorn.rb -e development -d     vagrant   4449  0.0 15.9 362204 162716 ?    sl   13:44   0:01 unicorn worker[0] -c /vagrant/config/unicorn.rb -e development -d 

high cpu usage means in use, tiny or no cpu means worker idle , not doing work.