Redis on ARM64 platforms may abort startup with a warning about a kernel COW bug when Transparent Huge Pages are enabled, risking RDB corruption; this guide explains the underlying issue, when it’s safe to ignore the warning, and provides two solutions—disabling THP or configuring ignore‑warnings—to ensure safe operation.
By configuring Linux Transparent Huge Pages and tuning kernel parameters, large‑scale cloud services can cut TLB misses and page‑table overhead, achieving over ten percent CPU and latency reductions while limiting memory growth to about ten percent, as demonstrated in Baidu’s production recommendation system.
This article explains the two types of Linux huge pages—static HugeTLB pages and dynamic Transparent Huge Pages—detailing their sizes, performance advantages, drawbacks, especially for Oracle workloads, and provides step‑by‑step instructions for checking status and permanently disabling THP via sysfs or GRUB.
