memory-contexts

Prevent memory leaks in PostgreSQL backend C extensions by enforcing strict adherence to memory context allocation rules, using MemoryContextReset and MemoryContextDelete to manage allocation lifecycles and avoid permanent leaks in long-running backend processes.

Use AllocSet, Slab, or Generation memory contexts in PostgreSQL to control data lifecycle scoping, ensuring data persists exactly as long as needed across per-tuple, per-query, or cache-level operations while avoiding premature deallocation.

Switch MemoryContext for long-lived allocations in PostgreSQL C by selecting the correct context type and using context-specific allocation macros, verifying proper context switching to prevent data loss and null-pointer dereferences during backend patch development.

The palloc and pfree contract in PostgreSQL memory management requires strict adherence to allocation discipline, using palloc, palloc0, and context-specific macros to avoid OOM errors and null-pointer dereferences during extension creation.

Debug memory context switching errors in PostgreSQL backend development by applying actionable cleanup rules with MemoryContextReset and MemoryContextDelete, preventing permanent leaks and corruption bugs in long-running backend processes.

Limitations of using palloc for per-tuple memory allocation in PostgreSQL include the risk of data loss if allocated in the wrong context, requiring careful lifecycle scoping and proper MemoryContext selection to avoid corruption and permanent leaks.