---
title: Internal time series databases
slug: internal-time-series-databases
createdAt: 2025-09-05T11:20:15.121Z
---

`_internal_factry` is a time series database used to store historian/collector logs and collector statistics. This database gets configured during the “First time setup” after installing the historian. The database is initialized with a retention policy named `_internal_factry_rp` of 12 weeks which means that data older than 12 weeks is not kept.

### Logs

You can view these logs in the historian.

**Common fields**

- timestamp
- application (2 options, reflects the type of the log)
  - historian-server
  - historian-collector
- message
- level

### Server logs

Logs from the historian server, they currently have no extra fields in InfluxDB. Which logs are stored are defined by the LOG\_LEVEL [environmental variable](docId\:sWKCAYy17F7TL9mntIDrj) .

### Collector logs

Logs sent by the collectors. Which logs get sent depends on the configured log level .

Extra fields:

- collector\_name
- collector\_type
- collector\_uuid
- measurement\_uuid
- version

## Statistics

Statistics from the collectors, these get updated every 30 seconds.

### System

- cpu\_usage (%): average over a period of 30s
- memory\_usage (%): average over a period of 30s
- free\_disk\_space (bytes): Free disk space of the drive the collector is installed on
- system\_uptime (seconds)
- uptime (seconds): Uptime of the Historian
- points\_written: Points written since last check
- cpu\_count: Amount of cpu’s on machine
- cpu\_load: Average cpu load
- memory\_total: Total available memory
- memory\_free: Available memory
- mount info(for every mount):
  - mount\_point
  - total\_disk\_space
  - free\_disk\_space

### Collector

- collector\_name
- collector\_type
- collector\_uuid
- collector\_uptime (seconds)
- version
- bad\_points: amount per 30 seconds
- good\_points: amount per 30 seconds
- points\_sent: amount per 30 seconds

### Buffer

- buffer\_current\_size: amount of points in memory
- buffer\_error\_files: amount of invalid buffer files
- buffer\_disk\_flushes: amount of disk flushes since last statistics update