Claude
e83c9949d8
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
13 lines
794 B
Plaintext
13 lines
794 B
Plaintext
== bytes per instance (= #bytes / #instances) from jcmd GC.class_histogram after loading 2,000,000 products
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class JDK 26 default JDK 27 default JDK 27 opt-out
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com.ankurm.memory.Product 40.0 32.0 40.0
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java.util.HashMap$Node 32.0 24.0 32.0
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java.lang.Long 24.0 16.0 24.0
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java.lang.String 24.0 24.0 24.0
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[B 32.7 32.6 32.7
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== total bytes of those five classes
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jdk26-default 309088088 bytes (294.8 MB)
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jdk27-default 260853264 bytes (248.8 MB)
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jdk27-optout 309272896 bytes (294.9 MB)
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