Definition
Resource balancing is the practice of managing finite resources, such as memory, file handles, network connections, locks, and database transactions, so that every resource acquired is reliably released. The guiding rule is that the code which allocates a resource is responsible for freeing it.
When acquisition and release are split across distant parts of a program, it becomes unclear who owns a resource and whether it was ever cleaned up. Resource balancing keeps that ownership explicit and local.
Why it matters
How it works
The core technique is to pair acquisition and release in the same scope and to use language features that guarantee cleanup even when an error occurs. Constructs such as scope-bound destructors, try-with-resources blocks, and context managers ensure release happens on every exit path.
When several resources are needed at once, acquire them in a consistent order and release them in the reverse order, which prevents the cyclic waits that cause deadlock. Where ownership cannot be local, it must at least be documented unambiguously so no resource is left to chance.