--- title: Java 25 in Production: Memory Dieting to Tame Latency... description: A staff engineer at Picnic shares how they tackled chronic latency and GC issues in their Java-based modular monolith serving over a million customers. The... canonical: https://daily.dev/posts/java-25-in-production-memory-dieting-to-tame-latency-and-garbage-collection-by-manish-askani-curmohukb twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Java 25 in Production: Memory Dieting to Tame Latency and Garbage Collection by Manish Askani | daily.dev og:description: A staff engineer at Picnic shares how they tackled chronic latency and GC issues in their Java-based modular monolith serving over a million customers. The... og:url: https://daily.dev/posts/java-25-in-production-memory-dieting-to-tame-latency-and-garbage-collection-by-manish-askani-curmohukb og:image: https://api.daily.dev/og/posts/curmOHuKB.png og:image:alt: Java 25 in Production: Memory Dieting to Tame Latency and Garbage Collection by Manish Askani 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. # Java 25 in Production: Memory Dieting to Tame Latency and Garbage Collection by Manish Askani **[Devoxx](https://daily.dev/sources/devoxx)** · 43 min read · 0 upvotes · 0 comments ## Summary A staff engineer at Picnic shares how they tackled chronic latency and GC issues in their Java-based modular monolith serving over a million customers. The root cause was accidentally disabling compressed ordinary object pointers (compressed oops) by exceeding 32GB heap, and cold JVM starts causing latency spikes during deployments. Three fixes delivered a 60% latency reduction and 36% heap reduction: re-enabling compressed oops by reducing heap below 32GB, upgrading to Java 25 and enabling compact object headers (shrinking object headers from 12 to 8 bytes, reducing heap by ~33%), and introducing synthetic JVM warm-up load before pods go live to pre-compile hot paths via JIT. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Does Java Really Use Too Much Memory? Let’s Look at the Facts \(JEPs\)](https://daily.dev/posts/does-java-really-use-too-much-memory-let-s-look-at-the-facts-jeps--cgw4iut56) · Foojay.io · 40 upvotes · 0 comments - [Reduce Object Header Size and Save Memory in Java 25](https://daily.dev/posts/reduce-object-header-size-and-save-memory-in-java-25-icvjxtjgw) · Baeldung · 18 upvotes · 0 comments --- Tags: [#java](https://daily.dev/tags/java), [#jvm](https://daily.dev/tags/jvm) [View this post on daily.dev](https://daily.dev/posts/java-25-in-production-memory-dieting-to-tame-latency-and-garbage-collection-by-manish-askani-curmohukb) ```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":"Java 25 in Production: Memory Dieting to Tame Latency and Garbage Collection by Manish Askani","url":"https://daily.dev/posts/java-25-in-production-memory-dieting-to-tame-latency-and-garbage-collection-by-manish-askani-curmohukb","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/java-25-in-production-memory-dieting-to-tame-latency-and-garbage-collection-by-manish-askani-curmohukb"},"datePublished":"2026-04-08T18:58:28.174Z","dateModified":"2026-04-08T18:58:48.306Z","description":"A staff engineer at Picnic shares how they tackled chronic latency and GC issues in their Java-based modular monolith serving over a million customers. 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