--- title: Warm Up Fast, Run Lean: Vertical Scaling for Java on... description: Java applications on Kubernetes face a warm-up challenge: JIT compilation requires extra CPU at startup but wastes resources if that allocation persists into... canonical: https://daily.dev/posts/warm-up-fast-run-lean-vertical-scaling-for-java-on-kubernetes-with-azul-prime-and-kedify-bzofmptgn twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Warm Up Fast, Run Lean: Vertical Scaling for Java on Kubernetes with Azul Prime and Kedify | daily.dev og:description: Java applications on Kubernetes face a warm-up challenge: JIT compilation requires extra CPU at startup but wastes resources if that allocation persists into... og:url: https://daily.dev/posts/warm-up-fast-run-lean-vertical-scaling-for-java-on-kubernetes-with-azul-prime-and-kedify-bzofmptgn og:image: https://api.daily.dev/og/posts/BzofmPTgN.png og:image:alt: Warm Up Fast, Run Lean: Vertical Scaling for Java on Kubernetes with Azul Prime and Kedify 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. # Warm Up Fast, Run Lean: Vertical Scaling for Java on Kubernetes with Azul Prime and Kedify **[Foojay.io](https://daily.dev/sources/foojayio)** · 12 min read · 0 upvotes · 0 comments ## Summary Java applications on Kubernetes face a warm-up challenge: JIT compilation requires extra CPU at startup but wastes resources if that allocation persists into steady state. This post explains how to use Azul Prime's JMX metric (TotalOutstandingCompiles) as a readiness signal combined with Kedify's PodResourceProfiles (PRPs) to dynamically allocate elevated CPU during JVM warm-up and automatically shrink it once optimization completes — all without pod restarts. The approach leverages Kubernetes in-place pod resource resize (GA in v1.33), a JMX-based readiness probe that gates traffic until the compilation queue drains, and a declarative PRP that transitions from 10 CPU cores during warm-up to 4 cores at steady state (~60% reclaimed). Azul Zing's 'finishWarmup' JMX method also adjusts internal thread pools to prevent CPU overconsumption after scale-down. The pattern complements horizontal autoscaling: new replicas get a temporary CPU boost, warm up faster, and then run lean. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Make Java Fleets Warm Up Faster on AWS With Azul Optimizer Hub](https://daily.dev/posts/make-java-fleets-warm-up-faster-on-aws-with-azul-optimizer-hub-tawnzha3a) · Foojay.io · 0 upvotes · 0 comments - [Java Warmup and the Scaling Loop Problem](https://daily.dev/posts/java-warmup-and-the-scaling-loop-problem-dpwtc9qnt) · Foojay.io · 1 upvotes · 0 comments - [What Happens When 10,000 JVMs Collaborate](https://daily.dev/posts/what-happens-when-10-000-jvms-collaborate-r81wdzvux) · Foojay.io · 0 upvotes · 0 comments - [Why high-performance Java is becoming a business imperative](https://daily.dev/posts/why-high-performance-java-is-becoming-a-business-imperative-priquzudb) · The Register · 0 upvotes · 0 comments --- Tags: [#kubernetes](https://daily.dev/tags/kubernetes), [#java](https://daily.dev/tags/java), [#jvm](https://daily.dev/tags/jvm) [View this post on daily.dev](https://daily.dev/posts/warm-up-fast-run-lean-vertical-scaling-for-java-on-kubernetes-with-azul-prime-and-kedify-bzofmptgn) ```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":"Warm Up Fast, Run Lean: Vertical Scaling for Java on Kubernetes with Azul Prime and Kedify","url":"https://daily.dev/posts/warm-up-fast-run-lean-vertical-scaling-for-java-on-kubernetes-with-azul-prime-and-kedify-bzofmptgn","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/warm-up-fast-run-lean-vertical-scaling-for-java-on-kubernetes-with-azul-prime-and-kedify-bzofmptgn"},"datePublished":"2026-07-17T08:08:25.711Z","dateModified":"2026-07-17T08:08:51.748Z","description":"Java applications on Kubernetes face a warm-up challenge: JIT compilation requires extra CPU at startup but wastes resources if that allocation persists into...","image":"https://media.daily.dev/image/upload/s--VDukGCjf--/f_auto/v1722860399/public/Placeholder%2002","thumbnailUrl":"https://media.daily.dev/image/upload/s--VDukGCjf--/f_auto/v1722860399/public/Placeholder%2002","isAccessibleForFree":true,"articleSection":"Foojay.io","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":"Foojay.io","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/1820f6a6ae944760aa322b67ed85f848","url":"https://daily.dev/sources/foojayio"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/warm-up-fast-run-lean-vertical-scaling-for-java-on-kubernetes-with-azul-prime-and-kedify-bzofmptgn","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"kubernetes,java,jvm","timeRequired":"PT12M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Foojay.io","item":"https://daily.dev/sources/foojayio"},{"@type":"ListItem","position":3,"name":"Warm Up Fast, Run Lean: Vertical Scaling for Java on Kubernetes with Azul Prime and Kedify"}]} ```