Java Image Notes

Supported Vendors and Versions

• Format: ghcr.io/yunuservices/images:{VENDOR}_{VERSION}
• corretto: 17, 21, 25, 26
• zulu: 17, 21, 25, 26
• liberica: 17, 21, 25, 26
• temurin: 17, 21, 25, 26
• graalvm: 17, 21, 25

Runtime Switches

• -Djemalloc=true
  • Enables jemalloc via LD_PRELOAD.
• -Dmimalloc=true
  • Enables mimalloc via LD_PRELOAD.
• -Dnuma=true
  • Runs startup command with numactl --interleave=all.

Default Behavior

• If neither allocator switch is enabled, the image runs with default malloc.
• If both -Djemalloc=true and -Dmimalloc=true are set, allocator selection is rejected and a warning is printed.
• If -Dnuma=true is set but numactl is unavailable, startup continues without NUMA policy.

Profiling Notes

• jemalloc is strong for heap profiling workflows.
  • It supports build-time profiling (--enable-prof) and runtime profiling controls via MALLOC_CONF.
  • jeprof tooling is part of common jemalloc profiling workflows.
• mimalloc is strong for performance and diagnostics, but not equivalent to jemalloc + jeprof profiling flow.
  • Official docs emphasize performance, stats, and tooling integration (for example ETW/diagnostics), not a direct jeprof-style heap profiling pipeline.