# Scale a Flow Instance

Flow on Helios instances can be resized after creation to match workload requirements and control credit consumption. Instance sizing is based on Flow instance size tiers (F1 - F3), each with a defined vCPU, memory, and credit rate per hour.

When selecting a new size, consider the following:

* **vCPU ratio to workspace**: Choose a Flow instance size so that Flow vCPUs are approximately one quarter of the vCPUs in the destination workspace (a 1 : 4 Flow-to-workspace vCPU ratio). This generally provides good performance balance between ingestion and query workloads.
* **Workload characteristics**: If the size and characteristics of the data are already well understood (data volume, number of tables, largest table size, expected concurrency, and required completion time), adjust the instance size accordingly to better fit the workload.

For detailed sizing guidance by workload type, including example scenarios and recommended sizes, refer to [Flow on Helios Sizing Guidelines](https://docs.singlestore.com/db/v9.1/load-data/load-data-with-singlestore-flow-on-helios/flow-on-helios-sizing-guidelines.md).

## Flow Instance Sizes

The following table lists the available Flow instance sizes and their resources:

| Size | vCPU | Memory | Credits per Hour (CR) |
| ---- | ---- | ------ | --------------------- |
| F1   | 2    | 4 GB   | 0.123 CR              |
| F2   | 4    | 8 GB   | 0.246 CR              |
| F3   | 8    | 16 GB  | 0.492 CR              |
| F4   | 16   | 32 GB  | 1.084 CR              |
| F5   | 32   | 64 GB  | 2.069 CR              |
| F6   | 64   | 128 GB | 4.138 CR              |
| F7   | 96   | 384 GB | 9.643 CR              |
| F8   | 192  | 768 GB | 18.731 CR             |

Depending on environment and preview configuration, higher tiers (for example, F4 and above) may appear disabled in the dialog. In that case, only the enabled sizes are available for selection.

## Scale a Flow Instance in the Cloud Portal

To change the size of an existing Flow on Helios instance:

1. In the Cloud Portal, navigate to **Load Data** > **Flow**.

2. In the **Actions** column for the instance to scale, click the three dots (…) and select **Scale**.

3. In the **Scale Flow Instance **dialog:

   1. Review the recommendation text and confirm the target size based on the destination workspace vCPUs and workload characteristics.

   2. Select the desired Flow instance size from the **Size** column.

   3. Review the associated vCPU, Memory, and Credits Per Hour values.

   4. **Save** the change in the dialog to apply the new instance size.

After the change is applied, the Flow instance runs with the newly selected size, and subsequent usage is billed at the corresponding credit rate. For more information on how instance size affects cost, refer to [Helios Pricing](https://www.singlestore.com/cloud-pricing/).

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Modified at: April 7, 2026

Source: [/db/v9.1/load-data/load-data-with-singlestore-flow-on-helios/scale-a-flow-instance/](https://docs.singlestore.com/db/v9.1/load-data/load-data-with-singlestore-flow-on-helios/scale-a-flow-instance/)

(An index of the documentation is available at /llms.txt)