Server Load Balancer (SLB) - ALB connection timeout increased to 3600 seconds
Dec 31 2025
Server Load Balancer (SLB)Content
Feature description: The maximum request timeout and connection idle timeout for Application Load Balancer (ALB) listeners has been significantly increased from 900 seconds (15 minutes) to 3600 seconds (1 hour). This enhancement is designed to support modern applications that require long-lived connections, preventing premature disconnections and request failures due to timeouts. This improves system stability, business continuity, and the end-user experience for a wide range of scenarios, including: long-running inference tasks, streaming responses from large language models (LLMs), waiting for AI training callbacks or other long-running async jobs, large file uploads and downloads, and real-time stream processing.
Help Document
https://www.alibabacloud.com/help/zh/slb/application-load-balancer/user-guide/alb-quotas-2/?spm=a2c63.p38356.0.i11#3560521cb2h62