JVM Internals

• ▸ jvm Garbage collectors compared — Serial, Parallel, G1, ZGC and Shenandoah
• ▸ jvm Heap generations — Eden, survivor spaces and the old generation
• ▸ jvm JIT compilation — interpreter, C1, C2 and tiered compilation
• ▸ jvm Class loaders and parent delegation
• ▸ jvm Memory leaks in Java — the usual suspects
• ▸ jvm ZGC — sub-millisecond pauses and generational ZGC
• ▸ jvm Escape analysis and scalar replacement
• ▸ jvm Reading a GC log — what to look at first
• ▸ jvm Finding a leak in a heap dump
• ▸ jvm JVM diagnostic tools — jcmd, jstack, jmap, jstat and JFR
• ▸ jvm Metaspace OutOfMemoryError — causes and diagnosis
• ▸ jvm Strong, soft, weak and phantom references
• ▸ jvm JVM memory areas — heap, stacks, metaspace and the rest
• ▸ jvm How G1 works — regions and mixed collections
• ▸ jvm Heap sizing and GC flags — Xms, Xmx and pause-time goals
• ▸ jvm StackOverflowError vs OutOfMemoryError — and the kinds of OOM