Function partially_truncate_metrics_history 

async fn partially_truncate_metrics_history(
    id: GlobalId,
    introspection_type: IntrospectionType,
    write_handle: &mut WriteHandle<SourceData, (), Timestamp, StorageDiff>,
    config_set: Arc<ConfigSet>,
    now: NowFn,
    storage_collections: Arc<dyn StorageCollections + Send + Sync>,
) -> Result<(), Error>

Truncates the given metrics history by removing all entries older than that history’s configured retention interval.

Panics

Panics if collection is not a metrics history.