19.10.0.0
19.10.0.0
Release date: October 30, 2019
This release corresponds to the following OpenJDK versions:
| Major Version | OpenJDK Version |
|---|---|
8 |
|
11 |
|
13 |
|
15 |
What’s New
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Zing 19.10.0.0 brings the associated JDK 7, JDK 8, and JDK 11 versions to October 2019 CPU security update levels.
-
Zing 19.10.0.0 introduces further performance improvements with the FalconOptimizationLevel command-line option set to:
-
0 or 1 to reduce CPU utilization and accelerate warmup phase without losing performance.
-
2 or 3 to get incremental performance improvements.
-
-
The release of Zing 19.10.0.0 provides better throughput and latency characteristics with heaps of 1 GB and below.
-
In Zing 19.10.0.0, the default for GC worker threads in small configurations (heaps less than or equal to 2 GB) are about two times lower than in larger heaps. Use
GPGCThreads,GenPauselessNewThreads,GenPauselessOldThreadscommand-line options to control the number of threads.
Known Issues
| Issue ID | Description |
|---|---|
ZVM-12876 |
Test failure due to code cache exhaustion on configurations with heaps of 4 GB and below are more likely to happen on ZVM 19.10.0.0 as the default CodeCache size progressively shrinks for such configurations. Workaround: Increase the code cache size using the -XX:ReservedCodeCacheSize=<size> option (you can specify up to 1280 MB for <size>). Alternatively, switch off the FalconGenerateProfilerInfo flag, set to true by default, for improving observability and gathering more accurate and complete information for debugging. |