JDK-8234141 : Release Note: JEP 345: NUMA-Aware Memory Allocation for G1
- Type: Sub-task
- Component: hotspot
- Sub-Component: gc
- Affected Version: 14
- Priority: P4
- Status: Closed
- Resolution: Delivered
- Submitted: 2019-11-14
- Updated: 2020-04-27
- Resolved: 2019-11-19
The Version table provides details related to the release that this issue/RFE will be addressed.
Unresolved : Release in which this issue/RFE will be addressed.
Resolved: Release in which this issue/RFE has been resolved.
Fixed : Release in which this issue/RFE has been fixed. The release containing this fix may be available for download as an Early Access Release or a General Availability Release.
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Unresolved : Release in which this issue/RFE will be addressed.
Resolved: Release in which this issue/RFE has been resolved.
Fixed : Release in which this issue/RFE has been fixed. The release containing this fix may be available for download as an Early Access Release or a General Availability Release.
To download the current JDK release, click here.
| JDK 14 |
|---|
14Resolved  |
Description
The G1 garbage collector now tries to allocate and keep objects on the same NUMA node in the young generation across garbage collections. This is similar to Parallel GC NUMA awareness. G1 attempts to evenly distribute Humongous and Old regions across all available NUMA nodes using a strict interleave. Placement of objects copied from young to old generation is random. These new NUMA-Aware Memory Allocation heuristics are automatically enabled by using the `-XX:+UseNUMA` command line option. See [JEP 345: NUMA-Aware Memory Allocation for G1](https://openjdk.java.net/jeps/345) for more information.