On Mon, 27 Nov 2000, Larry Leszczynski wrote:
> Hi All -
>
> I'm hoping for some enlightenment about how KeepAlive is implemented in
> Apache and whether KeepAlive even comes into play when front-end and
> back-end mod_perl servers communicate with each other via HTTP.
http://perl.apache.org/guide/performance.html#KeepAlive
> Suppose front-end server A is handling user requests. In the process of
> handling a front-end request, suppose I use LWP or equivalent to make a
> HTTP request from A to a back-end server B to get some data that is
> needed. Assuming all the right headers are set for KeepAlive to work
> (content length, etc.), can the connection between A and B even take
> advantage of KeepAlive for the next time A makes the same request to B?
>
> One problem is that I'm not sure what processes would actually be
> "keeping" the ends of the "kept alive" connections. At each end, would it
> be the parent httpd process, or the individual httpd child process that
> made/answered the request?
>
> I'm thinking that if A had to fork a CGI that in turn talked to B, the
> kept-alive connection would be lost as soon as the CGI process on A died
> (socket timeouts notwithstanding). But what if the request from A to B is
> made from within a mod_perl module, or within an Apache::Registry script?
>
> Along the same line of thought (assuming this has made any sense so far),
> what happens when you throw ProxyPass/ProxyPassReverse into the mix? What
> (if anything) can be done to take advantage of KeepAlive then?
>
>
> Larry Leszczynski
> [EMAIL PROTECTED]
>
>
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