CODEWITHSUNDEEP
ruby-on-railsmultithreadingruby-on-rails-3ruby-on-rails-4puma
andrefurquin
andrefurquin

Reputation: 522

Best way to correctly set the number of workers and threads in a Rails application using Puma?

Is there any formula to discover the number of workers and threads in a Rails application using puma ? Worker would be the number of cores ? How about threads ?? I've tried to search in similar topics, but it was not clear to me...

Upvotes: 6

Views: 6968

Answers (3)

zawhtut
zawhtut

Reputation: 8551

Number of Worker * Number of threads inside the worker = Database Connection pool size

For example, if you are using 2.5 GB RAM's plan and you want to make use of it up around 2 GB.

1 worker * 8 threads = 8(DB pool size)

Upvotes: 1

Antima Gupta
Antima Gupta

Reputation: 381

If you are using Heroku you can set your number of workers using puma according to your web dyno size.

For some applications two Puma workers will cause you to use more RAM than a standard-1x dyno can provide

Upvotes: 0

coding addicted
coding addicted

Reputation: 3430

Even if your not on Heroku they have good doc about Puma. Like this one: link

This answer helped me when I was asking myself the same question.

Basically I set the number of workers matching the number of cores and the number of threads according to the ram amount. But I'm not doing this with a rocket science formula (maybe I should), it's more like a try and adjustment process.

As a bonus reading I would suggest this article about how to scale a rails app to 1000 req/sec, it gives interesting suggestions: link

Upvotes: 5

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