When should I use keep-alive in HTTP?

What is keep-alive in HTTP?

Keep-alive is a feature that allows a single TCP connection to remain open for multiple HTTP requests/responses.

When should I use keep-alive?

You should use keep-alive when you want to improve performance by reducing latency and the overhead of establishing new connections.

Are there any downsides to using keep-alive?

Yes, keep-alive can lead to resource exhaustion on the server if too many connections are kept open for too long.

How do I enable keep-alive in my server configuration?

You can enable keep-alive in your server configuration by setting the appropriate headers, like 'Connection: keep-alive'.