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Editorial Team
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Asked: 2026-05-21T09:39:00+00:00

(This is a follow up to rails app fast on server, but slow when

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(This is a follow up to rails app fast on server, but slow when accessed from another machine.)

I have a Rails web app that’s incredibly slow when I access via its hostname, but runs at normal speeds when I access via its IP address (or via localhost, if I access it on the same server machine it’s running on). This makes me think the problem is with the DNS. (Also, all these machines are running on the same corporate intranet.)

However, when I ping the hostname from a terminal, the ping seems to run fine. Does the fact that pinging works suggest that the problem is not with the DNS? (I don’t really know much about DNS or servers and networking, so I’m kind of floundering around a bit here.)

Update to add: I also ran a simple “Hello world” Sinatra app, and this also runs super slowly when accessed via hostname (but not when accessed via IP address).

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  1. Editorial Team

    Fast ping from your terminal suggests that DNS between you and DNS server was fine and that network between you and server is fine.

    This still does not help with the DNS on your server. Do you have any network operations that your server performs? If so, you need to make sure the network is reachable.

    I suggest you get a simple “hello world” Rails application deployed there and see if it is Rails issue related (server wide) or your application related (very easy to do).

    The other suggestion is to profile your Rails app and see which operation is taking the time to complete.

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