zhangxing created FLINK-38954:
---------------------------------
Summary: Flink Benchmark Score Decreases After Upgrading JDK
Versions of Flink Engine and User Program
Key: FLINK-38954
URL: https://issues.apache.org/jira/browse/FLINK-38954
Project: Flink
Issue Type: Bug
Components: Runtime / Web Frontend
Affects Versions: 1.18.1
Reporter: zhangxing
Attachments: image-2026-01-21-15-56-21-514.png
For historical compatibility reasons, I compiled Flink 1.18.1 using JDK 8. Now,
I intend to upgrade the JDK version (to either 11 or 17) and want to test if
the performance improves after the upgrade—this will help me determine whether
the upgrade is meaningful. I chose to use the Flink Benchmark project for
testing; however, after conducting the tests, I found that many metrics
actually *decreased* following the JDK upgrade. I also checked the metrics in
Flink Speed Center and noticed the same issue (as shown in the figure below).
!image-2026-01-21-15-56-21-514.png!
Is this situation normal? Or is my testing approach correct?
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
