Well it is a deliberate choice, calling it a feature may still be a stretch. The log becomes unreadable because if you have many Rails instances (Like 25 unicor

Well it is a deliberate choice, calling it a feature may still be a stretch. The log becomes unreadable because if you have many Rails instances (Like 25 unicorn workers in my case) writing unbuffered in one log file it becomes a holy mess. This is happening only in production because you usually don't have multiple workers in development and you also don't have hundreds of requests per second.