Announcing Datadog Agent 5.1 with support for Btrfs and Go expvar

The newest release of the Datadog Agent, version 5.1.0, has been announced with several key improvements and additions. The update introduces support for Btrfs, a relatively new Linux filesystem, which was previously causing issues with file size and disk usage metrics. Additionally, support for "expvar" in Go has been added, allowing users to export variables as metrics in a dashboard. Furthermore, expanded support has been provided for existing integrations such as PostgreSQL, Jenkins, MongoDB, and directory integrations, including new features like lock counts for PostgreSQL and file-specific gauges for directories.