---
title: "Logs, metrics, and events"
description: "Choose the right evidence for application, network, resource, and platform problems."
---

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

# Logs, metrics, and events

Logs explain individual executions, metrics show changes over time, and events record operational changes.

## Choose a source

| Question | Read |
| --- | --- |
| Why did the process fail? | [Application logs](/docs/guides/observability/logs/application/) |
| What happened to an HTTP request? | [Access logs](/docs/guides/observability/logs/access/) |
| Is the application constrained? | [Application metrics](/docs/guides/observability/metrics/application/) |
| Is the host under pressure? | [Server metrics](/docs/guides/observability/metrics/server/) |
| What changed before the failure? | [Operation events](/docs/guides/observability/events/) |
| Why is history missing? | [Collection and retention](/docs/guides/observability/settings/) |

Source: https://cdelivery.dev/docs/guides/observability/index.mdx