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| author | Stefan Eissing <icing@apache.org> | 2016-10-21 09:35:18 +0000 |
|---|---|---|
| committer | Stefan Eissing <icing@apache.org> | 2016-10-21 09:35:18 +0000 |
| commit | a42d626bf5c18ca195a201433599ef1a5047417d (patch) | |
| tree | 587537ceb8751e418ac7bab1e6a4f7153f3a089c /docs/manual/howto/http2.html.en | |
| parent | fac9b336ca32e85ae1203281949f985837ff7575 (diff) | |
| download | httpd-a42d626bf5c18ca195a201433599ef1a5047417d.tar.gz | |
update after xml change
git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1765975 13f79535-47bb-0310-9956-ffa450edef68
Diffstat (limited to 'docs/manual/howto/http2.html.en')
| -rw-r--r-- | docs/manual/howto/http2.html.en | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/docs/manual/howto/http2.html.en b/docs/manual/howto/http2.html.en index 9655e390a7..ac912a0299 100644 --- a/docs/manual/howto/http2.html.en +++ b/docs/manual/howto/http2.html.en @@ -39,6 +39,7 @@ <li><img alt="" src="../images/down.gif" /> <a href="#implementation">HTTP/2 in Apache httpd</a></li> <li><img alt="" src="../images/down.gif" /> <a href="#building">Build httpd with HTTP/2 support</a></li> <li><img alt="" src="../images/down.gif" /> <a href="#basic-config">Basic Configuration</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#mpm-config">MPM Configuration</a></li> <li><img alt="" src="../images/down.gif" /> <a href="#clients">Clients</a></li> <li><img alt="" src="../images/down.gif" /> <a href="#tools">Useful tools to debug HTTP/2</a></li> <li><img alt="" src="../images/down.gif" /> <a href="#push">Server Push</a></li> @@ -159,6 +160,25 @@ how to manage multiple hosts with the same certificate</a>.</p> </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> <div class="section"> +<h2><a name="mpm-config" id="mpm-config">MPM Configuration</a></h2> + + + <p>HTTP/2 is supported in all multi-processing modules that come with httpd. However, if + you use the <code>prefork</code> mpm, there will be severe restrictions.</p> + <p>In <code>prefork</code> <code>mod_http2</code> will only process one request at at time + per connection. But clients, such as browsers, will send many requests at the same time. + If one of these takes long to process (or is a long polling one), the other requests will + stall.</p> + <p><code>mod_http2</code> will not work around this limit by default. The reason is that + <code>prefork</code> is today only chosen, if you run processing engines that re not + prepared for multi-threading, e.g. will crash with more than one request.</p> + <p>If your setup can handle it, configuring <code>event</code> mpm is nowadays + the best one (if supported on your platform).</p> + <p>If you are really stuck with <code>prefork</code> and want multiple requests, + you can tweak the <code class="directive"><a href="../mod/mod_http2.html#h2minworkers">H2MinWorkers</a></code> to make + that possible. If it breaks, however, you own both parts.</p> + </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="section"> <h2><a name="clients" id="clients">Clients</a></h2> <p>Almost all modern browsers support HTTP/2, but only over SSL connections: Firefox (v43), |