--- title: When and what should I be logging? | daily.dev description: Practical guidance on logging best practices for production applications. Covers what to log (runtime decisions, algorithm outcomes, audit events, error... canonical: https://daily.dev/posts/when-and-what-should-i-be-logging--muc9vc2tm twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: When and what should I be logging? | daily.dev og:description: Practical guidance on logging best practices for production applications. Covers what to log (runtime decisions, algorithm outcomes, audit events, error... og:url: https://daily.dev/posts/when-and-what-should-i-be-logging--muc9vc2tm og:image: https://api.daily.dev/og/posts/muC9VC2TM.png og:image:alt: When and what should I be logging? og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # When and what should I be logging? **[Sentry Engineering](https://daily.dev/sources/sentry)** · 9 min read · 0 upvotes · 0 comments ## Summary Practical guidance on logging best practices for production applications. Covers what to log (runtime decisions, algorithm outcomes, audit events, error context), how to structure log messages using key/value pairs, choosing appropriate log levels (debug/info/warn/error), and what to avoid (PII, secrets, excessive data blobs, every function call). Includes real-world code examples using Sentry's structured logging API, tips on accumulating request context, and warnings about compliance requirements like GDPR and HIPAA. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [When To Log, and When To Shut Up](https://daily.dev/posts/when-to-log-and-when-to-shut-up-7z7wzszzt) · The New Stack · 1 upvotes · 0 comments - [Logs vs Metrics: A Practical Guide for Engineers](https://daily.dev/posts/logs-vs-metrics-a-practical-guide-for-engineers-0gj1lz5ce) · Last9 · 62 upvotes · 0 comments - [How to structure a log](https://daily.dev/posts/how-to-structure-a-log-psj5teef9) · Sentry Engineering · 1 upvotes · 0 comments - [Structured Logging Patterns That Actually Survive Production — Daily DevOps & .NET](https://daily.dev/posts/structured-logging-patterns-that-actually-survive-production-daily-devops-net-lphiux5cy) · Daily DevOps & .NET · 6 upvotes · 0 comments - [Your Logs Are Lying To You](https://daily.dev/posts/your-logs-are-lying-to-you-eq23czgvl) · Hacker News · 156 upvotes · 3 comments --- Tags: [#logging](https://daily.dev/tags/logging), [#observability](https://daily.dev/tags/observability) [View this post on daily.dev](https://daily.dev/posts/when-and-what-should-i-be-logging--muc9vc2tm) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"When and what should I be logging?","url":"https://daily.dev/posts/when-and-what-should-i-be-logging--muc9vc2tm","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/when-and-what-should-i-be-logging--muc9vc2tm"},"datePublished":"2026-07-09T17:13:15.360Z","dateModified":"2026-07-09T17:26:36.188Z","description":"Practical guidance on logging best practices for production applications. 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