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Containers - Custom Container instance types no longer have a disk to memory ratio limit

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Containers
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Source
https://developers.cloudflare.com/changelog/post/2026-09-29-remove-disk-to-memory-ratio/

<p><a href="https://developers.cloudflare.com/containers/">Containers</a> custom instance types no longer limit disk based on memory. Previously, a custom instance type could have a maximum of 2 GB of disk for each 1 GiB of memory. You can now allocate up to the 20 GB disk maximum to any custom instance type.</p> <p>Use this to run workloads that need more disk than memory, such as workloads with large container images, datasets, or build caches. The maximum image size is the same as the instance disk space, so more disk also lets you deploy larger images.</p> <p>For example, a custom instance type with 1 vCPU and 3 GiB of memory was previously limited to 6 GB of disk. It can now use 20 GB:</p> <div data-nb-tabs data-nb-sync-key="wranglerConfig" class><div class="relative flex border-b border-border" role="tablist" data-nb-tabs-list><span class="bg-primary pointer-events-none absolute -bottom-px h-0.5 rounded-t-sm transition-[left,width] duration-200 ease-out" data-nb-tabs-indicator aria-hidden="true"></span></div><div class="mt-3"><div role="tabpanel" data-nb-tabs-content data-nb-tab-label="wrangler.jsonc" class><figure class="nb-code-figure" data-nb-lang="jsonc"><pre class="astro-code astro-code-themes github-light github-dark nb-shiki-c6xiwz" tabindex="0" data-language="jsonc" data-nb-lang="jsonc"><code><span class="line"><span class="nb-shiki-140thh">{</span></span> <span class="line"><span class="nb-shiki-dzsirb"> "containers"</span><span class="nb-shiki-140thh">: [</span></span> <span class="line"><span class="nb-shiki-140thh"> {</span></span> <span class="line"><span class="nb-shiki-dzsirb"> "image"</span><span class="nb-shiki-140thh">: </span><span class="nb-shiki-mdbnqw">"./Dockerfile"</span><span class="nb-shiki-140thh">,</span></span> <span class="line"><span class="nb-shiki-dzsirb"> "instance_type"</span><span class="nb-shiki-140thh">: {</span></span> <span class="line"><span class="nb-shiki-dzsirb"> "vcpu"</span><span class="nb-shiki-140thh">: </span><span class="nb-shiki-dzsirb">1</span><span class="nb-shiki-140thh">,</span></span> <span class="line"><span class="nb-shiki-dzsirb"> "memory_mib"</span><span class="nb-shiki-140thh">: </span><span class="nb-shiki-dzsirb">3072</span><span class="nb-shiki-140thh">,</span></span> <span class="line"><span class="nb-shiki-dzsirb"> "disk_mb"</span><span class="nb-shiki-140thh">: </span><span class="nb-shiki-dzsirb">20000</span><span class="nb-shiki-140thh">,</span></span> <span class="line"><span class="nb-shiki-140thh"> },</span></span> <span class="line"><span class="nb-shiki-140thh"> },</span></span> <span class="line"><span class="nb-shiki-140thh"> ],</span></span> <span class="line"><span class="nb-shiki-140thh">}</span></span></code></pre></figure></div><div role="tabpanel" data-nb-tabs-content data-nb-tab-label="wrangler.toml" class><figure class="nb-code-figure" data-nb-lang="toml"><pre class="astro-code astro-code-themes github-light github-dark nb-shiki-c6xiwz" tabindex="0" data-language="toml" data-nb-lang="toml"><code><span class="line"><span class="nb-shiki-140thh">[[</span><span class="nb-shiki-1t8gfj">containers</span><span class="nb-shiki-140thh">]]</span></span> <span class="line"><span class="nb-shiki-140thh">image = </span><span class="nb-shiki-mdbnqw">"./Dockerfile"</span></span> <span class="line"></span> <span class="line"><span class="nb-shiki-140thh"> [</span><span class="nb-shiki-1t8gfj">containers</span><span class="nb-shiki-140thh">.</span><span class="nb-shiki-1t8gfj">instance_type</span><span class="nb-shiki-140thh">]</span></span> <span class="line"><span class="nb-shiki-140thh"> vcpu = </span><span class="nb-shiki-dzsirb">1</span></span> <span class="line"><span class="nb-shiki-140thh"> memory_mib = </span><span class="nb-shiki-dzsirb">3_072</span></span> <span class="line"><span class="nb-shiki-140thh"> disk_mb = </span><span class="nb-shiki-dzsirb">20_000</span></span></code></pre></figure></div></div></div><script type="module" src="https://developers.cloudflare.com/home/runner/work/cloudflare-docs/cloudflare-docs/src/components/ui/tabs/Tabs.astro?astro&type=script&index=0&lang.ts"></script> <p>The other custom instance type constraints do not change, including the minimum of 3 GiB of memory per vCPU. For the full list, refer to <a href="https://developers.cloudflare.com/containers/platform/limits/#custom-instance-types">Custom Instance Types</a>.</p>

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