Solving the memory puzzle: OOM issues caused by increasing heap size

Reasons for Continuous Increase in Heap Size

1. Memory Leaks: When certain objects in the program are still being referenced after they are no longer in use, preventing the garbage collector from reclaiming these objects.
2. Improper Object Lifecycle Management: Creating many short-lived objects without timely releasing them.
3. Unreasonable Cache Usage: Caching a large amount of data without an appropriate cleaning mechanism.
4. Thread Issues: Creating a large number of threads but failing to destroy them in a timely manner, leading to increased memory usage.

Solutions

1. Analyze Memory Leaks: Use tools (such as VisualVM, YourKit, or Eclipse MAT) to analyze heap dumps and identify the root cause of memory leaks.
2. Optimize Code: Improve object lifecycle management to ensure that objects no longer needed can be promptly garbage collected.
3. Adjust Cache Strategy: Use weak or soft references for caching, so cached objects can be automatically cleaned when memory is insufficient.
4. Manage Thread Usage: Create and destroy threads appropriately to avoid creating too many unnecessary threads occupying memory.