Bad response from server: 500" on restart during Capistrano puma:restart · Issue #246 · puma/puma · GitHub
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How we've made Phusion Passenger 5 ("Raptor") up to 4x faster than Unicorn, up to 2x faster than Puma, Torquebox
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Setting up Rails app in Ubuntu machine (RVM + Sidekiq + Nginx + Puma + Capistrano) | by David Mauricio | Medium
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