Simple Tweaks to Get the Most Out of your JVM
summary
Overview of concrete JVM changes that reduce startup time and cloud cost: compares HotSpot, OpenJ9 and GraalVM and shows when switching runtime cuts memory and start latency; lists specific knobs — heap and GC tuning, idle tuning, and JIT server — and reports that simple flag changes often halve cold-starts in containers; describes enabling OpenJ9 class data sharing with a short demo, and gives exact JVM options and measurable before/after numbers for throughput, latency and CPU use.
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