# Normalization Devrim: LayerNorm, RMSNorm ve Pre-LN vs Post-LN — Training Stabilitesinin Temel Taşı

> Source: https://sukruyusufkaya.com/learn/llm-muhendisligi/layernorm-rmsnorm-pre-ln-post-ln
> Updated: 2026-08-19T00:59:29.334Z
> Category: LLM Mühendisliği
> Module: Modül 10: Transformer Block — Bloğun Anatomisi
**TLDR:** Transformer training stabilitesinin matematiksel ve sistemsel anatomi: LayerNorm (Ba 2016) klasik formülü, RMSNorm (Zhang 2019) — Llama-3 tercihi, niye gain parameter only, computational savings. Pre-LN (modern) vs Post-LN (original Vaswani) trade-off, gradient flow, deep transformer stability. Türkçe model fine-tune'da normalization concerns.