# Java JVM Updates and Memory Improvements in Jenkins **URL:** \ **Category:** Blog & News\ **Created:** [May 8, 2026, 1:41pm UTC](https://community.jenkins.io/t/java-jvm-updates-and-memory-improvements-in-jenkins/36884 "2026-05-08T13:41:56Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![system](https://dub1.discourse-cdn.com/flex013/user_avatar/community.jenkins.io/system/32/4910_2.png) [@system](https://community.jenkins.io/u/system)\ **Post date:** [May 8, 2026, 1:41pm UTC](https://community.jenkins.io/t/java-jvm-updates-and-memory-improvements-in-jenkins/36884/1 "2026-05-08T13:41:56Z")
We did not make a single code-level change to achieve this reduction. The main driver was the JVM change itself. Java 21 includes a number of runtime and garbage collection improvements that can positively affect memory behavior, especially in long-running server applications like Jenkins. While the exact impact depends on workload and configuration, the following areas are commonly relevant: - improved garbage collection behavior - runtime optimizations in the JVM In our case, the upgrade improved the memory usage in our production environment significantly. * * * This is a companion discussion topic for the original entry at [https://www.jenkins.io/blog/2026/05/08/JVM-upgrade/](https://www.jenkins.io/blog/2026/05/08/JVM-upgrade/) ---
**Author:** ![MarkEWaite](https://dub1.discourse-cdn.com/flex013/user_avatar/community.jenkins.io/markewaite/32/20_2.png) [@MarkEWaite](https://community.jenkins.io/u/MarkEWaite)\ **Post date:** [May 8, 2026, 3:09pm UTC](https://community.jenkins.io/t/java-jvm-updates-and-memory-improvements-in-jenkins/36884/2 "2026-05-08T15:09:40Z")
That is excellent news! Thanks for collecting those results and sharing them. ---
**Author:** ![system](https://dub1.discourse-cdn.com/flex013/user_avatar/community.jenkins.io/system/32/4910_2.png) [@system](https://community.jenkins.io/u/system)\ **Post date:** [May 8, 2026, 3:09pm UTC](https://community.jenkins.io/t/java-jvm-updates-and-memory-improvements-in-jenkins/36884/3 "2026-05-08T15:09:40Z")
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**Author:** ![froque](https://dub1.discourse-cdn.com/flex013/user_avatar/community.jenkins.io/froque/32/18312_2.png) [@froque](https://community.jenkins.io/u/froque)\ **Post date:** [May 14, 2026, 9:02am UTC](https://community.jenkins.io/t/java-jvm-updates-and-memory-improvements-in-jenkins/36884/4 "2026-05-14T09:02:29Z")
Correct link [Java JVM Updates and Memory Improvements in Jenkins](https://www.jenkins.io/blog/2026/05/08/JVM-upgrade/)