# `TimelessMetricsDashboard.DefaultMetrics`
[🔗](https://github.com/awksedgreep/timeless_metrics_dashboard/blob/main/lib/timeless_metrics_dashboard/default_metrics.ex#L1)

Pre-built `Telemetry.Metrics` definitions for common BEAM/Phoenix/Ecto/Timeless events.

These return standard `Telemetry.Metrics` structs — you can mix them with
your own custom metrics when configuring the reporter.

## Example

    metrics =
      TimelessMetricsDashboard.DefaultMetrics.vm_metrics() ++
      TimelessMetricsDashboard.DefaultMetrics.phoenix_metrics() ++
      TimelessMetricsDashboard.DefaultMetrics.ecto_metrics("my_app.repo") ++
      TimelessMetricsDashboard.DefaultMetrics.timeless_metrics()

    {TimelessMetricsDashboard, store: :metrics, metrics: metrics}

# `ecto_metrics`

Ecto repo metrics.

Takes the repo event prefix as a string (e.g., `"my_app.repo"`).
Captures query total_time, queue_time, decode_time, and idle_time,
tagged by source table.

# `live_view_metrics`

Phoenix LiveView and LiveComponent metrics.

Captures mount, handle_event, and handle_params durations for LiveViews,
plus handle_event for LiveComponents.

# `metrics`

All non-repo-specific metrics combined: VM, Phoenix, LiveView, and Timeless internals.

This is the default when no `:metrics` option is passed to `TimelessMetricsDashboard`.

# `phoenix_metrics`

Phoenix endpoint, router, channel, and socket metrics.

Captures request duration and count, tagged by method, route, and status.
Channel metrics are tagged by channel module and transport.

# `timeless_metrics`

Timeless internal metrics.

Captures the TSDB's own performance: buffer flushes, segment compression,
query latency, rollup duration, HTTP import throughput, and backpressure events.

These let you monitor Timeless itself — the database tracking its own health.

# `vm_metrics`

VM metrics emitted by `:telemetry_poller`.

Requires `{:telemetry_poller, "~> 1.0"}` in your deps and the default
poller running (it starts automatically).

Captures memory (total, processes, binary, atom, ets), run queue lengths,
and system counts (processes, atoms, ports).

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*Consult [api-reference.md](api-reference.md) for complete listing*