# Set Environmental Variables

**URL:** https://meta.discourse.org/t/set-environmental-variables/270832
**Category:** Self-Hosting
**Tags:** how-to
**Created:** [July 7, 2023, 12:02am UTC](https://meta.discourse.org/t/set-environmental-variables/270832 "2023-07-07T00:02:39Z")
**Posts on this page:** 1
**Showing post:** 6

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### Author: ![Hyan](https://avatars.discourse-cdn.com/v4/letter/h/5fc32e/32.png) [@Hyan](https://meta.discourse.org/u/Hyan)
#### Post date: [November 29, 2023, 1:03pm UTC](https://meta.discourse.org/t/set-environmental-variables/270832/6 "2023-11-29T13:03:47Z")

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Hi @SaraDev, may I know how these environment variables change the behaviour of the Discourse? For example, all of variable mentioned in this post [Available settings for global rate limits and throttling](https://meta.discourse.org/t/available-settings-for-global-rate-limits-and-throttling/78612) I cannot find any of them in the Discouse source code, then how these variable are hooked to Discourse? Thanks!

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