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The HTTP keep alive header allows a single TCP connection to remain open for multiple responses. Learn how to use connection keep alive to reduce the time to serve files and requests.
27 Ιουν 2024 · To enable Keep-Alive, you need to explicitly request it via the HTTP header by accessing .htaccess or the main configuration file of your web server. If you turn on Keep-Alive, the HTTP response header will show Connection: keep-alive.
14 Μαρ 2014 · HTTP uses a mechanism called keepalive connections to hold open the TCP connection between the client and the server after an HTTP transaction has completed. If the client needs to conduct another HTTP transaction, it can use the idle keepalive connection rather than creating a new TCP connection.
15 Δεκ 2020 · HTTP Keep-alive is the mechanism that instructs the client and server to maintain a persistent TCP connection, decoupling the one-to-one relationship between TCP and HTTP, effectively increasing the scalability of the server.
14 Αυγ 2010 · Keep-Alive connection feature in HTTP protocol is meant to reduce TCP connection hits to web server. It should be able to improve web server performance. However, I found that some web servers deliberately disable KeepAlive feature from server side.
A keep-alive allows an existing TCP connection to be re-used for multiple requests/responses, thus avoiding all of that overhead. That is what makes the connection "persistent". In HTTP 0.9 and 1.0, by default the server closes its end of a TCP connection after sending a response to a client.
HTTP persistent connection, also called HTTP keep-alive, or HTTP connection reuse, is the idea of using a single TCP connection to send and receive multiple HTTP requests/responses, as opposed to opening a new connection for every single request/response pair.
