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---
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title: "Resource limiting"
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description: "Max parallelism and limit on TCP connection in your build"
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keywords: build, buildx, buildkit, compute, network
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---
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## Max parallelism
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You can limit the parallelism of the BuildKit solver, which is particularly useful
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for low-powered machines, using a [BuildKit daemon configuration](https://github.com/moby/buildkit/blob/master/docs/buildkitd.toml.md)
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while creating a builder with the [`--config` flags](https://docs.docker.com/engine/reference/commandline/buildx_create/#config).
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```toml
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# /etc/buildkitd.toml
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[worker.oci]
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max-parallelism = 4
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```
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Now you can [create a `docker-container` builder](https://docs.docker.com/engine/reference/commandline/buildx_create/)
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that will use this BuildKit configuration to limit parallelism.
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```console
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$ docker buildx create --use \
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--name mybuilder \
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--driver docker-container \
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--config /etc/buildkitd.toml
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```
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## Limit on TCP connections
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We are also now limiting TCP connections to **4 per registry** with an additional
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connection not used for layer pulls and pushes. This limitation will be able to
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manage TCP connection per host to avoid your build being stuck while pulling
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images. The additional connection is used for metadata requests
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(image config retrieval) to enhance the overall build time.
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More info: [moby/buildkit#2259](https://github.com/moby/buildkit/pull/2259)
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