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Description of problem:
With 20k hosts registered, concurrent registration of more than 30 hosts is almost impossible due to big ruby memory consumption.


Version-Release number of selected component (if applicable):
satellite-6.2.8-4.0.el7sat.noarch


How reproducible:
1 of 1


Steps to Reproduce:
1. When there is a small number of hosts registered to Satellite and with
   some tunings, it is possible to concurrently register almost 100 hosts
2. With 20k hosts already registered, Satellite had a severe memory issues
   when I was registering 36 hosts in parallel


Actual results:
Ruby RSS memory goes up to 68 GB


Expected results:
It should be possible to register more systems in parallel than 36 no matter how many systems is already registered

Created attachment 1268744 [details]
ruby RSS memory during registration (times on the screenshot are in CEST)

Are these 20k active hosts or just the host entries?

(In reply to jcallaha from comment #3)
> Are these 20k active hosts or just the host entries?

This is scale environment with containers ( as same as real hosts).