2018-02-12 23:14:11 +00:00
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# Sysctl tuning
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2019-12-02 00:48:00 +00:00
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This example aims to demonstrate the use of an Init Container to adjust sysctl default values using `kubectl patch`
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2018-02-12 23:14:11 +00:00
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```console
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2019-12-02 00:48:00 +00:00
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kubectl patch deployment -n ingress-nginx nginx-ingress-controller \
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2021-08-07 00:07:29 +00:00
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--patch="$(curl https://raw.githubusercontent.com/kubernetes/ingress-nginx/main/docs/examples/customization/sysctl/patch.json)"
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2018-02-12 23:14:11 +00:00
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```
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2019-12-02 00:48:00 +00:00
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**Changes:**
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2019-12-02 00:57:09 +00:00
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2019-12-02 00:48:00 +00:00
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- Backlog Queue setting `net.core.somaxconn` from `128` to `32768`
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- Ephemeral Ports setting `net.ipv4.ip_local_port_range` from `32768 60999` to `1024 65000`
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2019-12-02 00:57:09 +00:00
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In a [post from the NGINX blog](https://www.nginx.com/blog/tuning-nginx/), it is possible to see an explanation for the changes.
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