Metrics settings in Kibana

You do not need to configure any settings to use the Metrics app in Kibana. It is enabled by default.

xpack.infra.sources.default.fields.message: Fields used to display messages in the Logs app. Defaults to ['message', '@message'].
xpack.infra.alerting.inventory_threshold.group_by_page_size: Controls the size of the composite aggregations used by the Inventory Threshold to retrieve all the hosts. Defaults to 10_000.
xpack.infra.alerting.metric_threshold.group_by_page_size: Controls the size of the composite aggregations used by the Metric Threshold group by feature. Defaults to 10_000.