---
title: System entropy metricset
description: This is the entropy metricset of the module system. It collects the amount of available entropy in bits. On kernel versions greater than 2.6, entropy...
url: https://www.elastic.co/elastic/docs-builder/docs/2452/reference/beats/metricbeat/metricbeat-metricset-system-entropy
applies_to:
  - Elastic Stack: Generally available in 9.0+
---

# System entropy metricset
This is the entropy metricset of the module system. It collects the amount of available entropy in bits. On kernel versions greater than 2.6, entropy will be out of a total pool size of 4096.
This Metricset is available on:
- linux


## Fields

For a description of each field in the metricset, see the [exported fields](https://www.elastic.co/elastic/docs-builder/docs/2452/reference/beats/metricbeat/exported-fields-system) section.
Here is an example document generated by this metricset:
```json
{
    "@timestamp": "2017-10-12T08:05:34.853Z",
    "event": {
        "dataset": "system.entropy",
        "duration": 115000,
        "module": "system"
    },
    "metricset": {
        "name": "entropy"
    },
    "service": {
        "type": "system"
    },
    "system": {
        "entropy": {
            "available_bits": 2801,
            "pct": 0.683837890625
        }
    }
}
```