--- title: You’ve worked with backend logging—what bug was caused... description: A brief account of how adding detailed logging inside hot code paths caused I/O to become a performance bottleneck under load. The fix involved sampling logs... canonical: https://daily.dev/posts/you-ve-worked-with-backend-logging-what-bug-was-caused-by-the-logging-itself-not-by-missing-logs--hafyc30yd twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: You’ve worked with backend logging—what bug was caused by the logging itself, not by missing logs? | daily.dev og:description: A brief account of how adding detailed logging inside hot code paths caused I/O to become a performance bottleneck under load. The fix involved sampling logs... og:url: https://daily.dev/posts/you-ve-worked-with-backend-logging-what-bug-was-caused-by-the-logging-itself-not-by-missing-logs--hafyc30yd og:image: https://api.daily.dev/og/posts/hAFyc30YD.png og:image:alt: You’ve worked with backend logging—what bug was caused by the logging itself, not by missing logs? 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. # You’ve worked with backend logging—what bug was caused by the logging itself, not by missing logs? **[Rebeloper](https://daily.dev/sources/rebeloper)** · 1 min read · 0 upvotes · 0 comments ## Summary A brief account of how adding detailed logging inside hot code paths caused I/O to become a performance bottleneck under load. The fix involved sampling logs and moving heavy logging off critical paths, turning the logging itself into the source of the bug rather than missing logs. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Async Logging Is Not a Silver Bullet — What Actually Limits Performance](https://daily.dev/posts/async-logging-is-not-a-silver-bullet-what-actually-limits-performance-h14m0a8he) · Faun · 24 upvotes · 2 comments --- Tags: [#logging](https://daily.dev/tags/logging), [#observability](https://daily.dev/tags/observability) [View this post on daily.dev](https://daily.dev/posts/you-ve-worked-with-backend-logging-what-bug-was-caused-by-the-logging-itself-not-by-missing-logs--hafyc30yd) ```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":"You’ve worked with backend logging—what bug was caused by the logging itself, not by missing logs?","url":"https://daily.dev/posts/you-ve-worked-with-backend-logging-what-bug-was-caused-by-the-logging-itself-not-by-missing-logs--hafyc30yd","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/you-ve-worked-with-backend-logging-what-bug-was-caused-by-the-logging-itself-not-by-missing-logs--hafyc30yd"},"datePublished":"2026-03-28T13:52:40.177Z","dateModified":"2026-03-28T13:52:56.247Z","description":"A brief account of how adding detailed logging inside hot code paths caused I/O to become a performance bottleneck under load. 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