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Add ephemeralStorageSize option docs #8142

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Add ephemeralStorageSize option docs #8142

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11 changes: 11 additions & 0 deletions src/pages/[platform]/build-a-backend/functions/configure-functions/index.mdx
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Expand Up @@ -69,6 +69,17 @@ export const myDemoFunction = defineFunction({
});
```

## `ephemeralStorageSize`

By default, functions have 512MB of ephemeral storage to them. This can be configured from 512 MB upto 10240 MB. Note that this can increase the cost of function invocation. For more pricing information see [here](https://aws.amazon.com/lambda/pricing/).

```ts title="amplify/functions/my-demo-function/resource.ts"
export const myDemoFunction = defineFunction({
// highlight-next-line
ephemeralStorageSize: 1024 // allocate 1024 MB of ephemeral storage to the function.
});
```

## `runtime`

Currently, only Node runtimes are supported by `defineFunction`. However, you can change the Node version that is used by the function. The default is the oldest Node LTS version that is supported by AWS Lambda (currently Node 18).
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