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# Watchdog Service

## Overview

The Watchdog service provides a means to monitor memory utilization of the system and reboot if the memory is getting too low and may end up causing system failure.

Note

The service requires built-in functionality that was added in NDS release 2.8.7. Any release prior than this will trigger the debugging code intended for operation on a PC. Please ensure that your version of NDS is updated to the latest version.

## Configuration

A typical watchdog configuration block looks like this:

    - name: wdog
      driver: services.watchdog_service:WatchdogService
      settings:
        watchdog_interval: 60
        low_memory_threshold: 300000

### Settings

watchdog_interval (required, default: 120)
  How often (in seconds) the watchdog service should run and perform system validation.
low_memory_threshold (optional)
  The amount of free memory at which the device should be rebooted. It is expressed in bytes.
auto_restart_interval (optional)
  If specified, the system will always be rebooted after the specified number of seconds has passed.

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