AWS AWSEC2 documentation change

Service: AWSEC2 · 2026-03-25 · Documentation low

File: AWSEC2/latest/UserGuide/ena-express.md

Summary

Added guidance on disabling TCP autocorking feature to minimize ENA Express TCP traffic latency, including a command to set tcp_autocorking to 0.

Security assessment

This change provides performance tuning guidance for network latency optimization. No security implications are mentioned or implied in the documentation change.

Diff

diff --git a/AWSEC2/latest/UserGuide/ena-express.md b/AWSEC2/latest/UserGuide/ena-express.md
index 38acbaf2b..317cc03eb 100644
--- a//AWSEC2/latest/UserGuide/ena-express.md
+++ b//AWSEC2/latest/UserGuide/ena-express.md
@@ -528,0 +529,4 @@ The ENA driver for the Amazon Linux distribution disables byte queue limits by d
+  * To minimize ENA Express TCP traffic latency, you can disable the TCP autocorking feature. This might result in a minimal increase in packet overhead:
+    
+        sudo bash -c 'echo 0 > /proc/sys/net/ipv4/tcp_autocorking'
+