> ## Documentation Index
> Fetch the complete documentation index at: https://docs.zyntex.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# Summary

> Distribution summaries for percentile/quantile views.

**Summaries** are distribution metrics optimized for **quantiles** (e.g., p50, p90, p99). They also support labels for slicing.

## Create and observe

```luau theme={null}
local Telemetry = Zyntex:Telemetry(10)

local levelTime = Telemetry:Summary("level_completion_seconds", {
    description = "Time to complete the current level"
})

levelTime:observe(47.9, {level="3"})
levelTime:observe(31.3, {level="3"})
```

## When to choose summary

* You primarily care about **p50 / p90 / p99** rather than the full histogram.
* **SLA/SLO** style monitoring (e.g., “99% of completions under 60s”).

<Note>
  In dashboards, choose a **percentile** view for Summary metrics to derive p50/p90/p99. If you need the **full shape** of the distribution, use a **Histogram** instead.
</Note>