Help Center/ Elastic Load Balance/ FAQs/ Backend Servers/ When Will the Changes to Server Weights Be Applied?

Updated on 2024-09-24 GMT+08:00

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When Will the Changes to Server Weights Be Applied?

The changes are applied within 5 seconds.

TCP and UDP listeners forward requests over new connections based on the new weights. However, connections that have been established with backend servers are still routed based on the previous weights.
HTTP and HTTPS listeners forward requests based on the new weights. However, requests that have been forwarded to backend servers will not be affected.

If the weight of a backend server is changed to 0, the new weight does not take effect immediately, and requests are still routed to this backend server. This is because a persistent connection is established between the load balancer and the backend server and requests are routed to this server until the connection times out.

TCP and UDP listeners: Persistent connections are disconnected after the idle timeout duration expires.
HTTP and HTTPS listeners: Persistent connections are disconnected after the response timeout duration expires.

Parent topic: Backend Servers

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