> ## Documentation Index
> Fetch the complete documentation index at: https://docs.e6data.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Cluster limits

> Naming rules, sizing bounds, and scaling/suspension limits for e6data clusters.

Reference limits for cluster naming, sizing, scaling, and suspension.

## Cluster naming

| Rule | Value |
| - | - |
| Length | 3–30 characters |
| Allowed characters | Letters (upper or lower case), numbers, and hyphens |
| Case | Case-sensitive |
| First character | A letter |
| Last character | A letter or digit |
| Mutability | Cannot be changed after creation |

## Sizing

| Size | Executors |
| - | - |
| XS / S / M / L / XL / XXL | 1 / 2 / 4 / 8 / 16 / 32 |
| Custom | 1–100 (you choose) |

## Scaling

| Parameter | Range | Default |
| - | - | - |
| Min executors (autoscaling) | 0–100 | 1 |
| Max executors (autoscaling) | 1–100 | 5 |

Set min executors to `0` for scale-to-zero.

## Suspension and resume

| Parameter | Range | Default |
| - | - | - |
| Auto-suspend idle timeout | 5–1440 minutes | 30 minutes |
| Auto-resume timeout | 30–600 seconds | 300 seconds |

## Configuration

| Parameter | Range | Default |
| - | - | - |
| Query timeout | 1–3600 seconds | 900 seconds |
| Result cache TTL | 60–86400 seconds | 300 seconds |

## See also

* [Create and manage clusters](/query/clusters/create-and-manage)
* [Cluster sizing and scaling](/query/clusters/sizing-and-scaling)
* [Query limits](/query/reference/query-limits)


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