I am trying to see the number of active puma threads on my server.

I can not see it through `ps`:

```
$ ps aux | grep puma
healthd   2623  0.0  1.8 683168 37700 ?        Ssl  May02   5:38 puma 2.11.1 (tcp://127.0.0.1:22221) [healthd]  
root      8029  0.0  0.1 110460  2184 pts/0    S+   06:34   0:00 grep --color=auto puma
root     18084  0.0  0.1  56836  2664 ?        Ss   May05   0:00 su -s /bin/bash -c puma -C /opt/elasticbeanstalk/support/conf/pumaconf.rb webapp
webapp   18113  0.0  0.8  83280 17324 ?        Ssl  May05   0:04 puma 2.16.0 (unix:///var/run/puma/my_app.sock) [/]                                                               
webapp   18116  3.5  6.2 784992 128924 ?       Sl   May05 182:35 puma: cluster worker 0: 18113 [/] 

```

As in the configuration I have:

```
threads 8, 32

```

I was expecting to see at least 8 puma threads?