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Resource lifecycle patterns: files, DB connections, sockets, locks. RAII, defer/finally, pooling, graceful shutdown, leak prevention.
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| name | resources-and-memory-management |
| description | Resource lifecycle patterns: files, DB connections, sockets, locks. RAII, defer/finally, pooling, graceful shutdown, leak prevention. |
| user-invocable | false |
Resources: files, connections, locks, semaphores, memory, OS handles, GPU.
Clean up in ALL paths: success, error, early return.
Language patterns: Go=defer, Rust=Drop(RAII), Python=with, TS=try/finally, Java=try-with-resources.
Pool config: min 5 (warm), max 20-50, idle timeout 5-10 min, validate before use, monitor utilization/wait/timeout.
Leak = acquire + never release โ exhaust system resources. Detect: monitor fd/connection/memory over time, long-duration tests, leak tools (valgrind, ASan, heap profilers). Prevent: use language cleanup patterns, never rely on manual alone.
Problem: producer > consumer โ unbounded queue โ OOM.
Solutions: bounded queues, rate limiting, flow control, circuit breakers, drop/reject (fail fast > crash).
GC'd (Go, Java, Python, JS): auto-freed, still must release non-memory resources, GC pauses in latency-sensitive, profile for retained refs.
Manual (C/C++): malloc/free, RAII in C++, prefer smart pointers.
Ownership (Rust): compiler-enforced safety, no GC, no manual mgmt. Arc/Rc for shared ownership.
