Why PostgreSQL users should enable strict memory overcommit to avoid OOM Killer issues

The article examines the interaction between PostgreSQL and the Linux OOM Killer. It explains that the OOM Killer can terminate PostgreSQL processes when memory is over‑allocated. The author recommends enabling strict memory overcommit in the kernel. Strict overcommit forces the system to reserve memory before allocation. This setting reduces the risk of unexpected process termination. PostgreSQL administrators are urged to adjust the vm.overcommit_memory parameter. Proper configuration helps maintain database stability under load. The piece advises testing the setting in staging before production rollout.