This functionality is in beta and is subject to change. The design and code is considered to be less mature than official GA features. Elastic will take a best effort approach to fix any issues, but beta features are not subject to the support SLA of official GA features.
Stats collected from Prometheus.
Stats about the Prometheus server.
Current queue length.
Number of dropped queue events.
Number of open file descriptors.
Number of memory chunks that are not yet persisted to disk.