HTTP/1.1draft, allows persistent connections. These long-lived HTTP sessions allow multiple requests to be send over the same TCP connection, and in some cases have been shown to result in an almost 50% speedup in latency times for HTML documents with lots of images.
Note: Apache 1.2 uses a different syntax for the KeepAlive directive.
This directive enables Keep-Alive support. Set max-requests
to the maximum number of requests you want Apache to entertain per
connection. A limit is imposed to prevent a client from hogging your
server resources. Set this to
0 to disable support.
The number of seconds Apache will wait for a subsequent request before
closing the connection. Once a request has been received, the timeout
value specified by the
However, Keep-Alive support only is active with files where the length is known beforehand. This means that most CGI scripts, server-side included files and directory listings will not use the Keep-Alive protocol. While this should be completely transparent to the end user, it is something the web-master may want to keep in mind.