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Grabage Collection

  • Identify and free memory of unreachable objects

How does garbage collection work in Java?​

  • The heap is divided into Young and Old generations
  • Minor GC cleans Young, Major GC cleans Old
  • Algorithm like G1 balance throughput and latency

OutOfMemoryError​

  • java.lang.OutOfMemoryError exception is thrown when there is insufficient space to allocate an object in the Java heap
  • The GC cannot make space available to accommodate a new object, and the heap cannot be expanded further
  • Also, it may be thrown when there is insufficient native memory to support the loading of a Java class