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3 changes: 1 addition & 2 deletions docs/categories/06-Advanced/performance-tuning.md
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## At the OS level

There are lots of good articles on how to tune your OS to accept a large number of connections. Please see [this one](https://blog.jayway.com/2015/04/13/600k-concurrent-websocket-connections-on-aws-using-node-js/) or [this one](https://medium.com/@elliekang/scaling-to-a-millions-websocket-concurrent-connections-at-spoon-radio-bbadd6ec1901) for example.
There are lots of good articles on how to tune your OS to accept a large number of connections. Please see [this one](https://medium.com/@elliekang/scaling-to-a-millions-websocket-concurrent-connections-at-spoon-radio-bbadd6ec1901) for example.

While [load testing](load-testing.md) your Socket.IO server, you will likely reach the two following limits:

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See also:

- https://unix.stackexchange.com/a/130798
- https://making.pusher.com/ephemeral-port-exhaustion-and-how-to-avoid-it/