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add UseCompactObjectHeaders note to local-env.sh template

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rdk
2026-02-23 02:11:29 +01:00
parent 57fb214881
commit 9fcce6156f
1 changed files with 6 additions and 4 deletions
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10
misc/local-env.sh
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@@ -6,10 +6,12 @@
# copy to project root dir and edit
#
# -Xmx31G max heap 31G (not 32G, to keep compressed oops enabled)
# -XX:+UseParallelGC throughput-oriented GC (better than G1 for batch workloads)
# -XX:+AlwaysPreTouch pre-fault heap pages at startup to avoid page faults later
# -XX:+EagerJVMCI initialize Graal JIT at startup for faster warmup (only with GraalVM)
# -Xmx31G max heap 31G (not 32G, to keep compressed oops enabled)
# -XX:+UseParallelGC throughput-oriented GC (better than G1 for batch workloads)
# -XX:+UseCompactObjectHeaders 64-bit object headers instead of 128-bit (JEP 450, JDK 24+)
# note: incompatible with -Xmx31G (compressed oops limit shifts to ~29G)
# -XX:+AlwaysPreTouch pre-fault heap pages at startup to avoid page faults later
# -XX:+EagerJVMCI initialize Graal JIT at startup for faster warmup (only with GraalVM)
export JAVA_LOCALENV_PARAMS="-Xmx31G -XX:+UseParallelGC"
export PRANK_LOCALENV_PARAMS="-threads 8"