Function metrics_hooks 

pub fn metrics_hooks<N: NodeTypesWithDB>(
    provider_factory: &ProviderFactory<N>,
) -> Hooks

Returns the metrics hooks for the node.

The storage hooks walk their backing store, which scales with the dataset, so they are registered as background hooks: metrics collection still refreshes them at most every 5 minutes, but renders the values of the previous refresh instead of waiting for the walk.