asmhatre/zgc-jdk25-benchmarks
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Add jdk27-memory: compact object headers and G1-everywhere on a Spring Boot service

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Spring Boot 4.1.1 catalog service measured on JDK 25, 26 and 27: live heap 320 MB to 273 MB with compact headers, per-class bytes per instance, container-sizing sweeps with real cgroup limits, 1-CPU Serial vs G1 with Native Memory Tracking, removed flags (MaxRAM, UseCompressedClassPointers), and a kernel OOM-kill check. Outputs in jdk27-memory/output.

Co-Authored-By: Claude Sonnet 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01TF9JWFvJSNm6HVzswzZU5a
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Claude
2026-09-24 15:09:55 +00:00
parent e189da79ba
commit e83c9949d8
29 changed files with 1041 additions and 0 deletions
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jdk27-memory/scripts/env.sh
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#!/usr/bin/env bash
# Where the three JDKs live. Override with environment variables; nothing else is hard-coded.
: "${JDK25:=/tmp/tools/j25/jdk-25.0.4.1+1}"
: "${JDK26:=$(ls -d /tmp/tools/j26/jdk-26* 2>/dev/null | head -1)}"
: "${JDK27:=/tmp/tools/j27/jdk-27+35}"
export JDK25 JDK26 JDK27
# The runs must not inherit proxy/trust-store options meant for Maven.
unset JAVA_TOOL_OPTIONS JDK_JAVA_OPTIONS _JAVA_OPTIONS