Why PostgreSQL Deployments Need Strict Memory Overcommit Settings

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A technical post by Ubicloud explains the risks PostgreSQL faces from the Linux OOM (Out-of-Memory) Killer process. When a Linux system runs low on memory, the OOM Killer terminates processes to free resources, which can abruptly kill PostgreSQL and cause data disruption. Ubicloud argues that enabling strict memory overcommit settings prevents the kernel from over-allocating memory in the first place, reducing the chance of the OOM Killer being triggered. This configuration change is presented as a critical best practice for anyone running PostgreSQL in production environments.

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