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A comment on Apache Helix – Near-Realtime Rsync Replicated File System. Parent comment
No, OpenJDK 15 defaults to G1 (since JDK 9), but it is very different from G1 in JDK 8 and rarely requires tuning: https://archive.fosdem.org/2020/schedule/event/g1/
Plus, ZGC, the low-latency collector (which gives a ~1-2ms max pause times on heaps of up to 16TB in JDK 16) was introduced in 11 and made production-ready in 15.
> Edit: also, did they replace the JIT with AOT?
Replace? Why would anyone want to do that? But there is an AOT compiler available: https://www.graalvm.org/reference-manual/native-image/
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No, OpenJDK 15 defaults to G1 (since JDK 9), but it is very different from G1 in JDK 8 and rarely requires tuning: https://archive.fosdem.org/2020/schedule/event/g1/
Plus, ZGC, the low-latency collector (which gives a ~1-2ms max pause times on heaps of up to 16TB in JDK 16) was introduced in 11 and made production-ready in 15.
> Edit: also, did they replace the JIT with AOT?
Replace? Why would anyone want to do that? But there is an AOT compiler available: https://www.graalvm.org/reference-manual/native-image/