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Last active August 29, 2015 14:06
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Thread-safe code in Rails
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Thread-safe code in Rails

It's not hard to write thread-safe code in a Rails application. Simple rules will save any app:

Don't share mutable state If you must share mutable state, mutex around all accesses to it

rails/rails#6685 (comment)

If config.threadsafe! is enabled and code is Non-threadsafe

In multi-process environments "would have little to no impact".

In multi-threaded environment the story is completely different.

http://tenderlovemaking.com/2012/06/18/removing-config-threadsafe.html

Processes and Threads environments

Passenger and Unicorn are both multi-process.

Passenger Enterprise can be configure as multi-threaded: http://www.modrails.com/documentation/Users%20guide%20Nginx.html#PassengerConcurrencyModel

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