Mar 13, 2025 · Additional parameters for the connection can be requested with the Keep-Alive header. Warning: Connection-specific header fields such as Connection and Keep-Alive are prohibited in HTTP/2 and HTTP/3. Chrome and Firefox ignore them in HTTP/2 responses, but Safari conforms to the HTTP/2 specification requirements and does not load any response ...

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 …

The Keep Alive signal can be used to trick intermediate hosts to not close the connection due to inactivity. It is also possible that one host is no longer listening (e.g. application or system crash).

Feb 17, 2012 · HTTP Keep-Alive is a feature of HTTP protocol. The web-server, implementing Keep-Alive Feature, has to check the connection/socket periodically (for incoming HTTP request) for the time span since it sent the last HTTP response (in …

Jan 29, 2018 · In the “Keep-Alive” case, it will start at the first byte sent for the request, and stop at the last byte. On his side, Apache starts its measuring when the request is assigned to a worker, and stop when the last byte is sent, releasing the worker.

One way to help avoid a really slow connection (or an idle one) getting treated as dead and wrongly killed, is to make sure TCP keep alive is used. TCP keepalive is a feature in the TCP protocol that makes it send "ping frames" back and forth when it would otherwise be totally idle.

Jan 15, 2025 · Keep-Alive is a critical optimization technique that enhances performance, saves resources, and delivers better user experiences. However, like all powerful tools, it requires careful...

UPDATED June 2023 - Describes how you can configure TCP keepalive to keep idle PostgreSQL connections open and to detect broken connections.

Keep-alive messages are sent every 30 seconds and contain an array of live fixture IDs with markets. This message is used for discrepancy tests. The following fixture statuses are included in the Keep Alive message:

Nov 2, 2023 · In simple terms, keepalive allows Nginx to keep connections open to clients and servers, rather than closing them after each request. This can provide meaningful benefits for performance, efficiency, and user experience.