Agent Version differences

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Datadog recommends you update Datadog Agent with every minor and patch release, or, at a minimum, monthly.

Upgrading to a major Datadog Agent version and keeping it updated is the only supported way to get the latest Agent functionality and fixes. The Agent has frequent update releases, though, and managing updates at enterprise scale can be challenging. That doesn't mean you should wait for major releases before updating. The right update cadence for your organization will depend on your infrastructure and your configuration management practices, but aim for monthly.

To update the Datadog Agent core between two minor versions on a given host, run the corresponding install command for your platform.

Datadog Agent release numbering follows SemVer rules.

Changes between major Agent versions

Agent v7 is the latest major version of the Datadog Agent. The main difference from Agent v6 is that this version only includes support for Python 3 for integrations and custom checks.

See the Upgrade to Agent v7 documentation to learn how to upgrade your Agent to version 7. All official integrations support Python 3 out-of-the-box. Follow the Python 3 Custom Check Migration guide to migrate your custom checks to Python 3.

Note: You can test this migration with Agent v6, by Using Python 3 with Datadog Agent v6.

Agent version 6 main changes:

The big difference between Agent 5 and Agent 6 is that Agent 6 is a complete rewrite of the core Agent in Golang. Golang has allowed the Agent to take advantage of concurrency. In place of the three processes the Agent v5 used to run—the Forwarder, the Collector, and DogStatsD—there is now only one process: the Agent. It also comes with a number of other core improvements:

Agent v6 has significantly improved resource usage over Agent v5:
- Decreased CPU usage
- Decreased memory usage
- Fewer file descriptors
- All around decreased footprint
Agent 6 uses two additional ports:
- 5000 to expose its runtime metrics.
- 5001 for the Agent CLI/GUI commands.
  Note: You can specify different ports for expvar_port and cmd_port in the datadog.yaml file.
Custom build your Agent v6 and DogStatsD much easier and with many more configuration options, to include or exclude almost anything.