--- title: Per-worker, and global, IO bandwidth in explain plans –... description: explain.depesz.com now shows two IO bandwidth metrics for parallel query nodes: average per-worker bandwidth and total exclusive-time disk bandwidth.... canonical: https://daily.dev/posts/per-worker-and-global-io-bandwidth-in-explain-plans-select-from-depesz--jcymjw9i1 twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Per-worker, and global, IO bandwidth in explain plans – select * from depesz; | daily.dev og:description: explain.depesz.com now shows two IO bandwidth metrics for parallel query nodes: average per-worker bandwidth and total exclusive-time disk bandwidth.... og:url: https://daily.dev/posts/per-worker-and-global-io-bandwidth-in-explain-plans-select-from-depesz--jcymjw9i1 og:image: https://api.daily.dev/og/posts/JcymJW9i1.png og:image:alt: Per-worker, and global, IO bandwidth in explain plans – select * from depesz; 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. # Per-worker, and global, IO bandwidth in explain plans – select * from depesz; **[depesz](https://daily.dev/sources/depesz)** · 3 min read · 0 upvotes · 0 comments ## Summary explain.depesz.com now shows two IO bandwidth metrics for parallel query nodes: average per-worker bandwidth and total exclusive-time disk bandwidth. Previously, only the per-worker average (~273 MB/s) was displayed. The new view also shows the aggregate disk throughput required during wall-clock execution time (~739 MB/s in the example), making it easier to understand actual disk pressure during parallel scans where timing data is summed across all workers. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Benchmarking Postgres 17 vs 18 — PlanetScale](https://daily.dev/posts/benchmarking-postgres-17-vs-18-planetscale-tzv6uysjb) · Hacker News · 1 upvotes · 0 comments - [10X more data, same 4 seconds: single-query scaling in Redpanda SQL on 1TB](https://daily.dev/posts/10x-more-data-same-4-seconds-single-query-scaling-in-redpanda-sql-on-1tb-qj6rt0fu2) · Redpanda · 0 upvotes · 0 comments --- Tags: [#postgresql](https://daily.dev/tags/postgresql) [View this post on daily.dev](https://daily.dev/posts/per-worker-and-global-io-bandwidth-in-explain-plans-select-from-depesz--jcymjw9i1) ```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":"Per-worker, and global, IO bandwidth in explain plans – select * from depesz;","url":"https://daily.dev/posts/per-worker-and-global-io-bandwidth-in-explain-plans-select-from-depesz--jcymjw9i1","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/per-worker-and-global-io-bandwidth-in-explain-plans-select-from-depesz--jcymjw9i1"},"datePublished":"2026-02-21T13:29:33.382Z","dateModified":"2026-02-21T13:29:50.176Z","description":"explain.depesz.com now shows two IO bandwidth metrics for parallel query nodes: average per-worker bandwidth and total exclusive-time disk bandwidth....","image":"https://media.daily.dev/image/upload/s--OHB84bZF--/f_auto/v1722860399/public/Placeholder%2010","thumbnailUrl":"https://media.daily.dev/image/upload/s--OHB84bZF--/f_auto/v1722860399/public/Placeholder%2010","isAccessibleForFree":true,"articleSection":"depesz","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"depesz","logo":"https://media.daily.dev/image/upload/s--ir7juGOi--/f_auto/v1758461024/logos/depesz","url":"https://daily.dev/sources/depesz"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/per-worker-and-global-io-bandwidth-in-explain-plans-select-from-depesz--jcymjw9i1","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"postgresql","timeRequired":"PT3M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"depesz","item":"https://daily.dev/sources/depesz"},{"@type":"ListItem","position":3,"name":"Per-worker, and global, IO bandwidth in explain plans – select * from depesz;"}]} ```