The Four Horsemen of the Apocalypse When Armageddon Comes to the JVM
summary
A 15-year JVM veteran examines four major causes of severe production slowdowns—garbage collection, I/O operations, threads, and interpreted bytecode—and demonstrates how to detect which one is affecting your system using tools from the JDK and the OS. The talk covers techniques to mitigate each problem: GC tuning and off-heap memory, non-blocking I/O and zero-copy buffers, lock-free programming with java.util.concurrent.atomic.*, and writing JIT-friendly code to assist just-in-time compilation.
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