---
title: Heroku event reference
description: Insights event types emitted by Heroku.
url: https://docs.honeybadger.io/insights/event-types/heroku/
---

Events parsed from your Heroku log drain: router request lines and Heroku Postgres metrics. Each entry lists the event's fields with their types, and links to its raw JSON Schema.

**2** events emitted by [`heroku`](https://docs.honeybadger.io/guides/insights/integrations/heroku/).

***

### postgres[](https://docs.honeybadger.io/insights/event-types/heroku/postgres/ "View event details")[](https://docs.honeybadger.io/insights/event-types/heroku/postgres.schema.json "View JSON Schema")

A Heroku Postgres log line from a Heroku log drain. Honeybadger recognizes it by proc\_id == 'heroku-postgres'.

| Field                  | Type    | Description                                                                                           |
| ---------------------- | ------- | ----------------------------------------------------------------------------------------------------- |
| `event_type`           | string  |                                                                                                       |
| `proc_id`              | string  | Heroku process identifier. Always 'heroku-postgres' for this event. Allowed value: `heroku-postgres`. |
| `source`               | string  | Postgres source identifier, e.g. "HEROKU\_POSTGRESQL\_CRIMSON".                                       |
| `addon`                | string  | Add-on name.                                                                                          |
| `active_connections`   | integer | Number of active database connections.                                                                |
| `waiting_connections`  | integer | Number of connections waiting on a lock.                                                              |
| `index_cache_hit_rate` | number  | Index cache hit rate (0.0–1.0).                                                                       |
| `table_cache_hit_rate` | number  | Table cache hit rate (0.0–1.0).                                                                       |
| `load_avg_1m`          | number  | 1-minute load average.                                                                                |
| `load_avg_5m`          | number  | 5-minute load average.                                                                                |
| `load_avg_15m`         | number  | 15-minute load average.                                                                               |
| `read_iops`            | number  | Read I/O operations per second.                                                                       |
| `write_iops`           | number  | Write I/O operations per second.                                                                      |
| `tmp_disk_used`        | integer | Bytes used on temporary disk.                                                                         |
| `tmp_disk_available`   | integer | Bytes available on temporary disk.                                                                    |
| `memory_total`         | integer | Total memory in bytes.                                                                                |
| `memory_free`          | integer | Free memory in bytes.                                                                                 |
| `memory_cached`        | integer | Cached memory in bytes.                                                                               |
| `memory_postgres`      | integer | Memory used by Postgres in bytes.                                                                     |

Example

```json
{
  "event_type": "logplex",
  "proc_id": "heroku-postgres",
  "source": "HEROKU_POSTGRESQL_CRIMSON",
  "addon": "postgresql-curved-12345",
  "active_connections": 12,
  "waiting_connections": 0,
  "index_cache_hit_rate": 0.99957,
  "table_cache_hit_rate": 0.98309,
  "load_avg_1m": 0.31,
  "load_avg_5m": 0.28,
  "load_avg_15m": 0.25,
  "read_iops": 12.5,
  "write_iops": 35.625,
  "tmp_disk_used": 33849344,
  "tmp_disk_available": 72944943104,
  "memory_total": 8589934592,
  "memory_free": 1342177280,
  "memory_cached": 5368709120,
  "memory_postgres": 1610612736
}
```

### router[](https://docs.honeybadger.io/insights/event-types/heroku/router/ "View event details")[](https://docs.honeybadger.io/insights/event-types/heroku/router.schema.json "View JSON Schema")

A Heroku router log line from a Heroku log drain. Honeybadger recognizes it by proc\_id == 'router'.

| Field        | Type    | Description                                                                         |
| ------------ | ------- | ----------------------------------------------------------------------------------- |
| `event_type` | string  |                                                                                     |
| `proc_id`    | string  | Heroku process identifier. Always 'router' for this event. Allowed value: `router`. |
| `method`     | string  | HTTP method, e.g. "GET", "POST".                                                    |
| `path`       | string  | Request path.                                                                       |
| `host`       | string  | Request host header.                                                                |
| `fwd`        | string  | Forwarded client IP address.                                                        |
| `dyno`       | string  | Dyno that handled the request, e.g. "web.1".                                        |
| `connect`    | number  | Time in milliseconds to establish the connection.                                   |
| `service`    | number  | Time in milliseconds the dyno spent processing the request.                         |
| `status`     | integer | HTTP response status code.                                                          |
| `bytes`      | integer | Number of bytes returned in the response.                                           |
| `protocol`   | string  | Protocol used, e.g. "https".                                                        |

Example

```json
{
  "event_type": "logplex",
  "proc_id": "router",
  "method": "GET",
  "path": "/users/123",
  "host": "www.example.com",
  "fwd": "203.0.113.42",
  "dyno": "web.1",
  "connect": 1,
  "service": 45,
  "status": 200,
  "bytes": 15342,
  "protocol": "https"
}
```

---

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