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Asked: 2026-05-18T05:33:54+00:00

I have a ruby on rails app running on passenger / nginx. The app

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I have a ruby on rails app running on passenger / nginx. The app allows users to have download access to very large files (VM backups, sometimes 200Gigs) and I’m on a burstable connection with my ISP up to 100 Mbit/sec.

The problem is that if you begin downloading one of these large files the transfer will climb as high as possible which I don’t want. I’d like to limit the downloading of these large files to a fixed rate such as 150 Kbps while still allowing faster speeds on other parts of the application. Is this possible?

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  1. Editorial Team

    You should include a directive like this in your nginx configuration file (inside the block of your server configuration):

    limit_rate 150k;

    This limits the speed of transmission of the answer to client. It works as a limit for each connection, not for the total server transfer rate. (Maybe you can adjust max_clients = worker_processes * worker_connections as a work-around to limit total transfer.)

    Take a look at nginx documentation for limit_rate. There is also a limit_rate_after directive that is useful to set this limit only after download exceeds certain size.

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