# Redis: # WARNING you have Transparent Huge Pages (THP) support enabled in your kernel. This will create latency and memory usage issues with Redis

**Code:** `WARNING you have Transparent Huge Pages (THP) support enabled` · **Category:** Redis · **Seen on:** Redis, Linux

THP is enabled, which can cause latency spikes and high memory usage with Redis.

## Meaning

Disable it: `echo never | sudo tee /sys/kernel/mm/transparent_hugepage/enabled`, persist via a systemd unit or `tuned`, and restart Redis. On Kubernetes/cloud hosts set it at the node level. It is a startup warning, but THP is a top cause of fork latency and RSS bloat.

## Common causes

- Default THP=always/madvise
- Cloud image defaults
- Containers sharing the host kernel setting
- Not persisted across reboots
- Latency issues during `BGSAVE`

## Quick fix

1. `echo never > /sys/kernel/mm/transparent_hugepage/enabled` (persist at boot)
2. Restart Redis
3. Verify the setting after reboot

## Detailed fix by platform

### Linux

1. `cat /sys/kernel/mm/transparent_hugepage/enabled`

## How to diagnose

1. **Setting** — never?
2. **Persist** — Boot unit?
3. **Latency** — After disable?

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Source: [WhatIsMyError](https://whatismyerror.com/errors/redis/redis-thp-warning)