> For the complete documentation index, see [llms.txt](https://docs.vngcloud.vn/vng-cloud-document/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.vngcloud.vn/vng-cloud-document/load-balancer/application-load-balancer/pool.md). # Pool A Pool (also known as a Server Group) is a critical component in a Load Balancing system. It is responsible for distributing traffic to backend servers, improving the performance, availability, and reliability of your services. #### The Main Purpose of a Pool The primary goal of a Pool is load balancing. It ensures that incoming traffic is evenly and efficiently distributed across backend servers. This prevents any single server from becoming overloaded while others remain idle. #### Pool Components A Pool consists of backend servers, referred to as "Pool Members." These Pool Members serve requests and respond to users or devices through the Load Balancer. #### Related Topics Learn more about Pool Members and other Pool features through the following articles/guides: * **Pool Members** * **Pool's Algorithm** * **Add & Update a Pool** * **Configuring Health Check Settings** * **Enabling Sticky Sessions** * **Enabling TLS Encryption** --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://docs.vngcloud.vn/vng-cloud-document/load-balancer/application-load-balancer/pool.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.