---
layout: docs
page_title: policy_eval Stanza - Nomad Autoscaler Agent Configuration
description: >-
  The "policy_eval" block holds the configuration related to the policy evaluation
  process.
---

# `policy_eval` Block

<Placement groups={['policy_eval']} />

The `policy_eval` block holds the configuration related to the policy evaluation
process.

```hcl
policy_eval {
  ack_timeout    = "10m"
  delivery_limit = 4

  workers = {
    cluster    = 2
    horizontal = 2
  }
}
```

### `policy_eval` Parameters

- `ack_timeout` `(string: "5m")` - The time limit that an eval must be ACK'd
  before being considered NACK'd.

- `delivery_limit` `(int: 1)` - The maximum number of times a policy evaluation
  can be dequeued from the broker.

- `workers` `(map<string|int>: [cluster:10,horizontal:10])` - The number of workers
  to initialize for each queue. Nomad Autoscaler supports `cluster` and `horizontal`
  map keys. Nomad Autoscaler Enterprise supports additional `vertical_mem` and
  `vertical_cpu` entries.
