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I checked with Heroku regarding this before considering using it. It seems that you should not be seeing the above (atleast on their latest cedar stack). When

by vineet 15y ago

I checked with Heroku regarding this before considering using it. It seems that you should not be seeing the above (atleast on their latest cedar stack). When you make a new push to Heroku, they seem to make sure to setup the code on a different machine, get it up, and then finally redirect the incoming requests from the load balancer.

ryanbrunner 15y ago
This is true only for a very trivial definition of "get it up". The second that Heroku starts your server all requests will be pushed over to the new dynos. For a Rails app, depending on how many gems you are loading and how fast your environment can load, this might be as much as 15 seconds of request queueing.