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<modulesynopsis metafile="mod_fcgid.xml.meta">
<name>mod_fcgid</name>
<description>Provides for execution of FastCGI applications</description>
<status>External</status> <!-- For now... -->
<sourcefile>mod_fcgid.c</sourcefile>
<identifier>fcgid_module</identifier>
<compatibility>Apache 2.0 and higher</compatibility>
<summary>
<p>Any program assigned to the handler <code>fcgid-script</code> is processed
using the FastCGI protocol; <module>mod_fcgid</module> starts a sufficient
number instances of the program to handle concurrent requests, and these
programs remain running to handle further incoming requests. This is
significantly faster than using the default <module>mod_cgi</module> or
<module>mod_cgid</module> modules to launch the program upon each request.
However, the programs invoked by <module>mod_fcgid</module> continue to
consume resources, so the administrator must weigh the impact of invoking
a particular program once per request against the resources required to
leave a sufficient number of instances running continuously.</p>
<p>The pool of fcgid-invoked programs is shared between all httpd workers.
Configuration directives below let the administrator tune the number of
instances of the program that will run concurrently.</p>
<p>Specific executables are assigned this handler either by having a name
containing an extension defined by the
<directive module="mod_mime">AddHandler</directive> directive, or with an
override using the <directive module="mod_mime">SetHandler</directive>
directive (e.g., for all files in a specific directory such as cgi-bin).</p>
<p>Some changes have been made in the ASF release of mod_fcgid which
can affect existing configurations. All documentation refers to new
names for the directives. (The old names still work but are now
deprecated.) Please read the <a href="#upgrade">Upgrade Notes</a> for
details.</p>
<p>For an introduction to using CGI scripts with Apache, see
the generic tutorial on <a href="../howto/cgi.html">Dynamic Content
With CGI</a>.</p>
</summary>
<!-- References to other documents or directives -->
<seealso><a href="../howto/cgi.html">Dynamic Content With CGI</a></seealso>
<seealso><module>mod_cgi</module></seealso>
<seealso><module>mod_cgid</module></seealso>
<section id="upgrade">
<title>Upgrade Notes</title>
<p>The following changes have been made in the ASF release of mod_fcgid
and should be considered when upgrading from the original version by
Ryan Pan (Pan Qingfeng).</p>
<ul>
<li>All directives have been renamed in order to use a common prefix "Fcgid".
Underscores in directive names have been eliminated in favor of
CamelCase. The old directive names will still work but are deprecated.
To fix your configuration you can use the sed script build/fixconf.sed.
The following table contains old and new directive names:
<table border="1" style="zebra">
<tr><th>Old Name</th><th>New Name</th></tr>
<tr>
<td><directive>BusyScanInterval</directive></td>
<td><directive module="mod_fcgid">FcgidBusyScanInterval</directive></td>
</tr>
<tr>
<td><directive>BusyTimeout</directive></td>
<td><directive module="mod_fcgid">FcgidBusyTimeout</directive></td>
</tr>
<tr>
<td><directive>DefaultInitEnv</directive></td>
<td><directive module="mod_fcgid">FcgidInitialEnv</directive></td>
</tr>
<tr>
<td><directive>DefaultMaxClassProcessCount</directive></td>
<td><directive module="mod_fcgid">FcgidMaxProcessesPerClass</directive></td>
</tr>
<tr>
<td><directive>DefaultMinClassProcessCount</directive></td>
<td><directive module="mod_fcgid">FcgidMinProcessesPerClass</directive></td>
</tr>
<tr>
<td><directive>ErrorScanInterval</directive></td>
<td><directive module="mod_fcgid">FcgidErrorScanInterval</directive></td>
</tr>
<tr>
<td><directive>FastCgiAccessChecker</directive></td>
<td><directive module="mod_fcgid">FcgidAccessChecker</directive></td>
</tr>
<tr>
<td><directive>FastCgiAccessCheckerAuthoritative</directive></td>
<td><directive module="mod_fcgid">FcgidAccessCheckerAuthoritative</directive></td>
</tr>
<tr>
<td><directive>FastCgiAuthenticator</directive></td>
<td><directive module="mod_fcgid">FcgidAuthenticator</directive></td>
</tr>
<tr>
<td><directive>FastCgiAuthenticatorAuthoritative</directive></td>
<td><directive module="mod_fcgid">FcgidAuthenticatorAuthoritative</directive></td>
</tr>
<tr>
<td><directive>FastCgiAuthorizer</directive></td>
<td><directive module="mod_fcgid">FcgidAuthorizer</directive></td>
</tr>
<tr>
<td><directive>FastCgiAuthorizerAuthoritative</directive></td>
<td><directive module="mod_fcgid">FcgidAuthorizerAuthoritative</directive></td>
</tr>
<tr>
<td><directive>FCGIWrapper</directive></td>
<td><directive module="mod_fcgid">FcgidWrapper</directive></td>
</tr>
<tr>
<td><directive>IdleScanInterval</directive></td>
<td><directive module="mod_fcgid">FcgidIdleScanInterval</directive></td>
</tr>
<tr>
<td><directive>IdleTimeout</directive></td>
<td><directive module="mod_fcgid">FcgidIdleTimeout</directive></td>
</tr>
<tr>
<td><directive>IPCCommTimeout</directive></td>
<td><directive module="mod_fcgid">FcgidIOTimeout</directive></td>
</tr>
<tr>
<td><directive>IPCConnectTimeout</directive></td>
<td><directive module="mod_fcgid">FcgidConnectTimeout</directive></td>
</tr>
<tr>
<td><directive>MaxProcessCount</directive></td>
<td><directive module="mod_fcgid">FcgidMaxProcesses</directive></td>
</tr>
<tr>
<td><directive>MaxRequestInMem</directive></td>
<td><directive module="mod_fcgid">FcgidMaxRequestInMem</directive></td>
</tr>
<tr>
<td><directive>MaxRequestLen</directive></td>
<td><directive module="mod_fcgid">FcgidMaxRequestLen</directive></td>
</tr>
<tr>
<td><directive>MaxRequestsPerProcess</directive></td>
<td><directive module="mod_fcgid">FcgidMaxRequestsPerProcess</directive></td>
</tr>
<tr>
<td><directive>OutputBufferSize</directive></td>
<td><directive module="mod_fcgid">FcgidOutputBufferSize</directive></td>
</tr>
<tr>
<td><directive>PassHeader</directive></td>
<td><directive module="mod_fcgid">FcgidPassHeader</directive></td>
</tr>
<tr>
<td><directive>PHP_Fix_Pathinfo_Enable</directive></td>
<td><directive module="mod_fcgid">FcgidFixPathinfo</directive></td>
</tr>
<tr>
<td><directive>ProcessLifeTime</directive></td>
<td><directive module="mod_fcgid">FcgidProcessLifeTime</directive></td>
</tr>
<tr>
<td><directive>SharememPath</directive></td>
<td><directive module="mod_fcgid">FcgidProcessTableFile</directive></td>
</tr>
<tr>
<td><directive>SocketPath</directive></td>
<td><directive module="mod_fcgid">FcgidIPCDir</directive></td>
</tr>
<tr>
<td><directive>SpawnScore</directive></td>
<td><directive module="mod_fcgid">FcgidSpawnScore</directive></td>
</tr>
<tr>
<td><directive>SpawnScoreUpLimit</directive></td>
<td><directive module="mod_fcgid">FcgidSpawnScoreUpLimit</directive></td>
</tr>
<tr>
<td><directive>TerminationScore</directive></td>
<td><directive module="mod_fcgid">FcgidTerminationScore</directive></td>
</tr>
<tr>
<td><directive>TimeScore</directive></td>
<td><directive module="mod_fcgid">FcgidTimeScore</directive></td>
</tr>
<tr>
<td><directive>ZombieScanInterval</directive></td>
<td><directive module="mod_fcgid">FcgidZombieScanInterval</directive></td>
</tr>
</table>
</li>
</ul>
</section>
<section id="examples">
<title>Examples</title>
<note type="hint"><title>Note</title>
<p>The examples assume that mod_fcgid and other necessary
modules are loaded into the server already, either built-in or
via the <directive module="mod_so">LoadModule</directive>
directive.</p>
<p>Additionally, the example configurations provide full access
to the applications using access control directives which work
with Apache 2.0 and 2.2. These directives are not appropriate
for all environments, and they do not work for development
levels of Apache HTTP Server (Subversion trunk).</p>
</note>
<p>The first example is a very simple Perl FastCGI application,
and its configuration directives. This is typical for FastCGI
applications which require no special configuration.</p>
<example><title>Perl FastCGI application - /usr/local/apache/fcgi-bin/foo.pl</title>
#!/usr/bin/perl<br />
use CGI::Fast;<br />
<br />
while (my $q = CGI::Fast->new) {<br />
<indent>
print("Content-Type: text/plain\n\n");<br />
foreach $var (sort(keys(%ENV))) {<br />
<indent>
$val = $ENV{$var};<br />
$val =~ s|\n|\\n|g;<br />
$val =~ s|"|\\"|g;<br />
print "${var}=\"${val}\"\n";<br />
</indent>
}<br />
</indent>
}<br />
</example>
<example><title>Configuration directives</title>
<Directory /usr/local/apache/fcgi-bin/><br />
<indent>
SetHandler fcgid-script<br />
Options +ExecCGI<br />
<br />
# Customize the next two directives for your requirements.<br />
Order allow,deny<br />
Allow from all<br />
</indent>
</Directory><br />
</example>
<p>PHP applications are usually configured using the
<directive module="mod_fcgid">FcgidWrapper</directive> directive
and a corresponding wrapper script. The wrapper script can be
an appropriate place to define any environment variables required
by the application, such as <code>PHP_FCGI_MAX_REQUESTS</code>
or anything else. (Environment variables can also be set with
<directive module="mod_fcgid">FcgidInitialEnv</directive>,
but they then apply to all applications.)</p>
<p>Here is an example that uses a wrapper script to invoke PHP:</p>
<example><title>PHP application - /usr/local/phpapp/phpinfo.php</title>
<?php<br />
<indent>
phpinfo();<br />
</indent>
?><br />
</example>
<example><title>Configuration directives</title>
# FcgidMaxRequestsPerProcess should be <= PHP_FCGI_MAX_REQUESTS<br />
# The example PHP wrapper script overrides the default PHP setting.<br />
FcgidMaxRequestsPerProcess 10000<br />
<br />
# Uncomment the following line if cgi.fix_pathinfo is set to 1 in<br />
# php.ini:<br />
# FcgidFixPathinfo 1<br />
<br />
Alias /phpapp/ /usr/local/phpapp/<br />
<Location /phpapp/><br />
<indent>
AddHandler fcgid-script .php<br />
Options +ExecCGI<br />
FcgidWrapper /usr/local/bin/php-wrapper .php<br />
<br />
# Customize the next two directives for your requirements.<br />
Order allow,deny<br />
Allow from all<br />
</indent>
</Location><br />
</example>
<example><title>PHP wrapper script - /usr/local/bin/php-wrapper</title>
#!/bin/sh<br />
# Set desired PHP_FCGI_* environment variables.<br />
# Example:<br />
# PHP FastCGI processes exit after 500 requests by default.<br />
PHP_FCGI_MAX_REQUESTS=10000<br />
export PHP_FCGI_MAX_REQUESTS<br />
<br />
# Replace with the path to your FastCGI-enabled PHP executable<br />
exec /usr/local/bin/php-cgi<br />
</example>
<note type="hint"><title>Special PHP considerations</title>
<p>By default, PHP FastCGI processes exit after handling 500
requests, and they may exit after this module has already
connected to the application and sent the next request. When that
occurs, an error will be logged and <code>500 Internal Server
Error</code> will be returned to the client. This PHP behavior
can be disabled by setting <code>PHP_FCGI_MAX_REQUESTS</code> to
0, but that can be a problem if the PHP application leaks
resources. Alternatively, <code>PHP_FCGI_MAX_REQUESTS</code> can
be set to a much higher value than the default to reduce the
frequency of this problem.
<directive module="mod_fcgid">FcgidMaxRequestsPerProcess</directive>
can be set to a value less than or equal to
<code>PHP_FCGI_MAX_REQUESTS</code> to resolve the problem.</p>
<p>PHP child process management (<code>PHP_FCGI_CHILDREN</code>)
should always be disabled with mod_fcgid, which will only route
one request at a time to application processes it has spawned;
thus, any child processes created by PHP will not be used
effectively. (Additionally, the PHP child processes may not be
terminated properly.) By default, and with the environment
variable setting <code>PHP_FCGI_CHILDREN=0</code>, PHP child
process management is disabled.</p>
<p>The popular APC opcode cache for PHP cannot share a cache
between PHP FastCGI processes unless PHP manages the child
processes. Thus, the effectiveness of the cache is limited with
mod_fcgid; concurrent PHP requests will use different opcode
caches.</p>
</note>
</section>
<section id="process-mgmt">
<title>Process Management</title>
<p>mod_fcgid has several types of controls which affect the creation
of additional application processes:</p>
<table border="1" style="zebra">
<tr><th>Type of control</th><th>Directive</th></tr>
<tr>
<td>global limit on number of processes</td>
<td><directive module="mod_fcgid">FcgidMaxProcesses</directive></td>
</tr>
<tr>
<td>limit on number of processes per application</td>
<td><directive module="mod_fcgid">FcgidMaxProcessesPerClass</directive></td>
</tr>
<tr>
<td>limit on rate of spawning new application processes</td>
<td><directive module="mod_fcgid">FcgidSpawnScoreUpLimit</directive> and
other score-related directives</td>
</tr>
</table>
<p>mod_fcgid has several types of controls which affect the termination
of existing application processes:</p>
<table border="1" style="zebra">
<tr><th>Type of control</th><th>Directive</th></tr>
<tr>
<td>termination after an idle period</td>
<td><directive module="mod_fcgid">FcgidIdleTimeout</directive></td>
</tr>
<tr>
<td>termination after it handles a certain number of requests</td>
<td><directive module="mod_fcgid">FcgidMaxRequestsPerProcess</directive></td>
</tr>
<tr>
<td>termination after a certain lifetime</td>
<td><directive module="mod_fcgid">FcgidProcessLifetime</directive></td>
</tr>
</table>
<p>Several of the directives control processing for a <em>process
class</em>. A process class is the set of processes which were started
with the same executable file and share certain other characteristics such
as virtual host and identity. Two commands which are links to or otherwise
refer to the same executable file share the same process class.</p>
<note type="hint"><title>Note</title>
<p>Certain settings or other concepts that depend on the virtual host,
such as <directive module="mod_fcgid">FcgidInitialEnv</directive>
or process classes, distinguish between virtual hosts only if they
have distinct server names. (See the <directive>ServerName</directive>
documentation for more information.) In the case of
<directive module="mod_fcgid">FcgidInitialEnv</directive>, if two
virtual hosts have the same server name but different environments as
defined by
<directive module="mod_fcgid">FcgidInitialEnv</directive>, the
environment used for a particular request will be that defined for the
virtual host of the request that caused the FastCGI process to be
started.</p>
</note>
<p>Information about each process will be displayed in the
<module>mod_status</module> server-status page.</p>
</section>
<directivesynopsis>
<name>FcgidAccessChecker</name>
<description>full path to FastCGI access checker</description>
<syntax>FcgidAccessChecker <em>command</em></syntax>
<default>none</default>
<contextlist><context>directory</context> <context>.htaccess</context></contextlist>
<override>FileInfo</override>
<usage>
<p>Access checking or, more formally, access control, is a procedure
which verifies that the client is allowed to access a resource, using
some mechanism other than authentication and authorization.</p>
<p>Key environment variables passed to the application for access
checking are:</p>
<dl>
<dt><code>FCGI_APACHE_ROLE</code></dt>
<dd>set to <code>ACCESS_CHECKER</code>; by checking the current role,
the same FastCGI application can handle multiple stages of request
processing</dd>
</dl>
<p>The application must output a <code>Status</code> line to indicate
the result of the check.</p>
<note type="warning"><title>Warning</title>
<p>Before 2.3.6, only one FastCGI application of any type (AAA or handler)
can be used for a particular request URI. Otherwise, the wrong FastCGI
application may be invoked for one or more phases of request processing.</p>
</note>
</usage>
</directivesynopsis>
<directivesynopsis>
<name>FcgidAccessCheckerAuthoritative</name>
<description>Set to 'off' to allow access control to be passed along to lower modules upon failure</description>
<syntax>FcgidAccessCheckerAuthoritative <em>On|Off</em></syntax>
<default>FcgidAccessCheckerAuthoritative On</default>
<contextlist><context>directory</context> <context>.htaccess</context></contextlist>
<override>FileInfo</override>
<usage>
<p>This directive controls whether or not other access checkers
are allowed to run when this module has an access checker configured
and it fails a request. If this directive is <code>On</code> (default)
and a FastCGI access checker returns a failure status, a failure is
returned to the client without giving other access checkers a chance to
allow access. If this directive is <code>Off</code>, other access
checkers will be called.</p>
</usage>
</directivesynopsis>
<directivesynopsis>
<name>FcgidAuthenticator</name>
<description>full path to FastCGI authenticator</description>
<syntax>FcgidAuthenticator <em>command</em></syntax>
<default>none</default>
<contextlist><context>directory</context> <context>.htaccess</context></contextlist>
<override>FileInfo</override>
<usage>
<p>Authentication is the procedure which verifies that the user is
who they claim they are. This directive specifies the full path to
a FastCGI application which will handle authentication for a particular
context, such as a directory.</p>
<p>Key environment variables passed to the application on authentication
are:</p>
<dl>
<dt><code>REMOTE_USER</code></dt>
<dd>set to the user id of the client</dd>
<dt><code>REMOTE_PASSWD</code></dt>
<dd>set to the plain text password provided by the client</dd>
<dt><code>FCGI_APACHE_ROLE</code></dt>
<dd>set to <code>AUTHENTICATOR</code>; by checking the current role,
the same FastCGI application can handle multiple stages of request
processing</dd>
</dl>
<p>The application must output a <code>Status</code> line to indicate
the result of authentication.</p>
<note type="warning"><title>Warning</title>
<p>Before 2.3.6, only one FastCGI application of any type (AAA or handler)
can be used for a particular request URI. Otherwise, the wrong FastCGI
application may be invoked for one or more phases of request processing.</p>
</note>
</usage>
</directivesynopsis>
<directivesynopsis>
<name>FcgidAuthenticatorAuthoritative</name>
<description>Set to 'off' to allow authentication to be passed along to lower modules upon failure</description>
<syntax>FcgidAuthenticatorAuthoritative <em>On|Off</em></syntax>
<default>FcgidAuthenticatorAuthoritative On</default>
<contextlist><context>directory</context> <context>.htaccess</context></contextlist>
<override>FileInfo</override>
<usage>
<p>This directive controls whether or not other authenticators
are allowed to run when this module has an authenticator configured
and it fails a request. If this directive is <code>On</code> (default)
and a FastCGI authenticator returns a failure status, a failure is
returned to the client without giving other authenticators a chance to
validate the client identity. If this directive is <code>Off</code>,
other authenticators will be called.</p>
</usage>
</directivesynopsis>
<directivesynopsis>
<name>FcgidAuthorizer</name>
<description>full path to FastCGI authorizer</description>
<syntax>FcgidAuthorizer <em>command</em></syntax>
<default>none</default>
<contextlist><context>directory</context> <context>.htaccess</context></contextlist>
<override>FileInfo</override>
<usage>
<p>Authorization is the procedure which verifies that the user is
allowed to access a particular resource. This directive specifies
the full path to a FastCGI application which will handle authorization
for a particular context, such as a directory.</p>
<p>Key environment variables passed to the application on authorization
are:</p>
<dl>
<dt><code>REMOTE_USER</code></dt>
<dd>set to the user id of the client, which has already been
authenticated</dd>
<dt><code>FCGI_APACHE_ROLE</code></dt>
<dd>set to <code>AUTHORIZER</code>; by checking the current role, the
same FastCGI application can handle multiple stages of request
processing</dd>
</dl>
<p>The application must output a <code>Status</code> line to indicate
the result of authorization.</p>
<note type="warning"><title>Warning</title>
<p>Before 2.3.6, only one FastCGI application of any type (AAA or handler)
can be used for a particular request URI. Otherwise, the wrong FastCGI
application may be invoked for one or more phases of request processing.</p>
</note>
</usage>
</directivesynopsis>
<directivesynopsis>
<name>FcgidAuthorizerAuthoritative</name>
<description>Set to 'off' to allow authorization to be passed along to lower modules upon failure</description>
<syntax>FcgidAuthorizerAuthoritative <em>On|Off</em></syntax>
<default>FcgidAuthorizerAuthoritative On</default>
<contextlist><context>directory</context> <context>.htaccess</context></contextlist>
<override>FileInfo</override>
<usage>
<p>This directive controls whether or not other authorizers
are allowed to run when this module has an authorizer configured
and it fails a request. If this directive is <code>On</code> (default)
and a FastCGI authorizer returns a failure status, a failure is
returned to the client without giving other authorizer a chance to
access the resource. If this directive is <code>Off</code>, other
authorizers will be called.</p>
</usage>
</directivesynopsis>
<directivesynopsis>
<name>FcgidBusyScanInterval</name>
<description>scan interval for busy timeout process</description>
<syntax>FcgidBusyScanInterval <em>seconds</em></syntax>
<default>FcgidBusyScanInterval 120</default>
<contextlist><context>server config</context></contextlist>
<usage>
<p>The module performs the
<directive module="mod_fcgid">FcgidBusyTimeout</directive> check at this
interval.</p>
</usage>
</directivesynopsis>
<directivesynopsis>
<name>FcgidBusyTimeout</name>
<description>a FastCGI application will be killed after handling a request for FcgidBusyTimeout</description>
<syntax>FcgidBusyTimeout <em>seconds</em></syntax>
<default>FcgidBusyTimeout 300</default>
<contextlist><context>server config</context> <context>virtual host</context></contextlist>
<usage>
<p>This is the maximum time limit for request handling. If a FastCGI
request does not complete within FcgidBusyTimeout seconds, it will be
subject to termination. Because the check is performed at the
interval defined by <directive module="mod_fcgid">FcgidBusyScanInterval</directive>,
request handling may be allowed to proceed for a longer period of time.</p>
<p>The purpose of this directive is to terminate hung applications.
The default timeout may need to be increased for applications that
can take longer to process the request.</p>
</usage>
</directivesynopsis>
<directivesynopsis>
<name>FcgidCmdOptions</name>
<description>Set processing options for a FastCGI
command</description>
<syntax>FcgidCmdOptions <em>command</em> <em>option</em>
[<em>option</em>] ...</syntax>
<contextlist><context>server config</context> <context>virtual host</context></contextlist>
<usage>
<p>This directive allows processing options to be specified for
a specific command spawned by mod_fcgid. Each option for the
command corresponds to another directive that normally applies to
all commands started within a particular context. If a
particular option is not specified on this directive, the
default will be used.</p>
<p>The following table provides a list of options and
corresponding directives:</p>
<table border="1" style="zebra">
<tr><th>Option name and syntax</th><th>Corresponding directive</th></tr>
<tr>
<td><code>ConnectTimeout <em>seconds</em></code></td>
<td><directive module="mod_fcgid">FcgidConnectTimeout</directive></td>
</tr>
<tr>
<td><code>IdleTimeout <em>seconds</em></code></td>
<td><directive module="mod_fcgid">FcgidIdleTimeout</directive></td>
</tr>
<tr>
<td><code>InitialEnv <em>name[=value]</em></code></td>
<td><directive module="mod_fcgid">FcgidInitialEnv</directive></td>
</tr>
<tr>
<td><code>IOTimeout <em>seconds</em></code></td>
<td><directive module="mod_fcgid">FcgidIOTimeout</directive></td>
</tr>
<tr>
<td><code>MaxProcesses <em>value</em></code></td>
<td><directive module="mod_fcgid">FcgidMaxProcessesPerClass</directive></td>
</tr>
<tr>
<td><code>MaxProcessLifeTime <em>seconds</em></code></td>
<td><directive module="mod_fcgid">FcgidProcessLifeTime</directive></td>
</tr>
<tr>
<td><code>MaxRequestsPerProcess <em>value</em></code></td>
<td><directive module="mod_fcgid">FcgidMaxRequestsPerProcess</directive></td>
</tr>
<tr>
<td><code>MinProcesses <em>value</em></code></td>
<td><directive module="mod_fcgid">FcgidMinProcessesPerClass</directive></td>
</tr>
</table>
<p>Multiple environment variables are defined by repeating
the <code>InitialEnv</code> option.</p>
<example><title>Example</title>
FcgidCmdOptions /usr/local/bin/wrapper \<br />
<indent>
InitialEnv MAX_REQUESTS=2000 \<br />
MaxRequestsPerProcess 2000 \<br />
IOTimeout 90<br />
</indent>
</example>
<p>When <code>/usr/local/bin/wrapper</code> is spawned, its initial
environment contains the <code>MAX_REQUESTS=2000</code>
environment variable setting; additionally, mod_fcgid will
terminate it after it has handled 2000 requests, and I/O
operations will time out after 90 seconds. Directives
corresponding to other options, such as
<directive module="mod_fcgid">FcgidIdleTimeout</directive> or
<directive module="mod_fcgid">FcgidProcessLifeTime</directive>,
will be ignored for this command; defaults will be used for options
not specified on <directive>FcgidCmdOptions</directive>.</p>
</usage>
</directivesynopsis>
<directivesynopsis>
<name>FcgidInitialEnv</name>
<description>an environment variable name and optional value to pass to FastCGI.</description>
<syntax>FcgidInitialEnv <em>name</em> [ <em>value</em> ]</syntax>
<default>none</default>
<contextlist><context>server config</context> <context>virtual host</context></contextlist>
<usage>
<p>Use <directive>FcgidInitialEnv</directive> to define environment
variables to pass to the FastCGI application. This directive can
be used multiple times.</p>
<p>This setting will apply to all applications spawned for this
server or virtual host. Use
<directive module="mod_fcgid">FcgidCmdOptions</directive> to apply
this setting to a single application.</p>
</usage>
</directivesynopsis>
<directivesynopsis>
<name>FcgidMaxProcessesPerClass</name>
<description>Max process count of one class of FastCGI application</description>
<syntax>FcgidMaxProcessesPerClass <em>value</em></syntax>
<default>FcgidMaxProcessesPerClass 100</default>
<contextlist><context>server config</context> <context>virtual host</context></contextlist>
<usage>
<p>This directive sets the maximum number of processes that can be
started for each process class.</p>
<p>This setting will apply to all applications spawned for this
server or virtual host. Use
<directive module="mod_fcgid">FcgidCmdOptions</directive> to apply
this setting to a single application.</p>
</usage>
</directivesynopsis>
<directivesynopsis>
<name>FcgidMinProcessesPerClass</name>
<description>Min process count of one class of FastCGI application</description>
<syntax>FcgidMinProcessesPerClass <em>value</em></syntax>
<default>FcgidMinProcessesPerClass 3</default>
<contextlist><context>server config</context> <context>virtual host</context></contextlist>
<usage>
<p>This directive sets the minimum number of processes that will be
retained in a process class after finishing requests.</p>
<p>This setting will apply to all applications spawned for this
server or virtual host. Use
<directive module="mod_fcgid">FcgidCmdOptions</directive> to apply
this setting to a single application.</p>
</usage>
</directivesynopsis>
<directivesynopsis>
<name>FcgidErrorScanInterval</name>
<description>scan interval for exited process</description>
<syntax>FcgidErrorScanInterval <em>seconds</em></syntax>
<default>FcgidErrorScanInterval 3</default>
<contextlist><context>server config</context></contextlist>
<usage>
<p>This is the interval at which the module will handle
pending process termination. Termination is pending for
any processes which have exceeded
<directive module="mod_fcgid">FcgidIdleTimeout</directive> or
<directive module="mod_fcgid">FcgidProcessLifeTime</directive>.</p>
<p>Unix: mod_fcgid will terminate such processes with SIGTERM;
if the process is still active during the next scan, the process
will be terminated with SIGKILL. Thus, this directive controls the
amount of time for orderly process terminate before being forcibly
killed.</p>
</usage>
</directivesynopsis>
<directivesynopsis>
<name>FcgidIdleScanInterval</name>
<description>scan interval for idle timeout process</description>
<syntax>FcgidIdleScanInterval <em>seconds</em></syntax>
<default>FcgidIdleScanInterval 120</default>
<contextlist><context>server config</context></contextlist>
<usage>
<p>This is the interval at which the module will search for
processes which have exceeded
<directive module="mod_fcgid">FcgidIdleTimeout</directive> or
<directive module="mod_fcgid">FcgidProcessLifeTime</directive>.</p>
</usage>
</directivesynopsis>
<directivesynopsis>
<name>FcgidIdleTimeout</name>
<description>An idle FastCGI application will be killed after FcgidIdleTimeout</description>
<syntax>FcgidIdleTimeout <em>seconds</em></syntax>
<default>FcgidIdleTimeout 300</default>
<contextlist><context>server config</context> <context>virtual host</context></contextlist>
<usage>
<p>Application processes which have not handled a request for this
period of time will be terminated, if the number of processses for the
class exceeds
<directive module="mod_fcgid">FcgidMinProcessesPerClass</directive>.
A value of <code>0</code> disables the check.</p>
<p>This idle timeout check is performed at the frequency of the configured
<directive module="mod_fcgid">FcgidIdleScanInterval</directive>.</p>
<p>This setting will apply to all applications spawned for this
server or virtual host. Use
<directive module="mod_fcgid">FcgidCmdOptions</directive> to apply
this setting to a single application.</p>
</usage>
</directivesynopsis>
<directivesynopsis>
<name>FcgidIOTimeout</name>
<description>Communication timeout to FastCGI server</description>
<syntax>FcgidIOTimeout <em>seconds</em></syntax>
<default>FcgidIOTimeout 40</default>
<contextlist><context>server config</context> <context>virtual host</context></contextlist>
<usage>
<p>This is the maximum period of time the module will wait
while trying to read from or write to a FastCGI application.</p>
<note type="hint"><title>Note</title>
<p>The FastCGI application must begin generating the response within
this period of time. Increase this directive as necessary to handle
applications which take a relatively long period of time to respond.</p>
</note>
<p>This setting will apply to all applications spawned for this
server or virtual host. Use
<directive module="mod_fcgid">FcgidCmdOptions</directive> to apply
this setting to a single application.</p>
</usage>
</directivesynopsis>
<directivesynopsis>
<name>FcgidConnectTimeout</name>
<description>Connect timeout to FastCGI server</description>
<syntax>FcgidConnectTimeout <em>seconds</em></syntax>
<default>FcgidConnectTimeout 3</default>
<contextlist><context>server config</context> <context>virtual host</context></contextlist>
<usage>
<p>This is the maximum period of time the module will wait
while trying to connect to a FastCGI application on Windows.
(This directive is not respected on Unix, where AF_UNIX defaults
will apply.)</p>
<p>This setting will apply to all applications spawned for this
server or virtual host. Use
<directive module="mod_fcgid">FcgidCmdOptions</directive> to apply
this setting to a single application.</p>
</usage>
</directivesynopsis>
<directivesynopsis>
<name>FcgidMaxProcesses</name>
<description>maximum number of FastCGI application processes</description>
<syntax>FcgidMaxProcesses <em>value</em></syntax>
<default>FcgidMaxProcesses 1000</default>
<contextlist><context>server config</context></contextlist>
<usage>
<p>This directive sets the maximum number of FastCGI application
processes which can be active at one time.</p>
</usage>
</directivesynopsis>
<directivesynopsis>
<name>FcgidMaxRequestInMem</name>
<description>maximum size of a request which will be held in memory</description>
<syntax>FcgidMaxRequestInMem <em>bytes</em></syntax>
<default>FcgidMaxRequestInMem 65536</default>
<contextlist><context>server config</context> <context>virtual host</context></contextlist>
<usage>
<p>This module reads the entire request body from the client
before sending it to the application. Normally the request body
will be stored in memory. Once the amount of request body read
from the client exceeds <directive>FcgidMaxRequestInMem</directive>
bytes, the remainder of the request body will be stored in a
temporary file.</p>
</usage>
</directivesynopsis>
<directivesynopsis>
<name>FcgidMaxRequestLen</name>
<description>maximum HTTP request length</description>
<syntax>FcgidMaxRequestLen <em>bytes</em></syntax>
<default>FcgidMaxRequestLen 131072</default>
<contextlist><context>server config</context> <context>virtual host</context></contextlist>
<usage>
<p>If the size of the request body exceeds this amount, the
request will fail with <code>500 Server Error</code>.</p>
<p>Administrators should change this to an appropriate value for their site based
on application requirements.</p>
<note type="warning"><title>Warning</title>
<p>Before 2.3.6, this defaulted to 1GB. Most users of earlier versions should
use this directive to set a more reasonable limit.</p>
</note>
</usage>
<seealso><directive module="mod_fcgid">FcgidMaxRequestInMem</directive></seealso>
</directivesynopsis>
<directivesynopsis>
<name>FcgidMaxRequestsPerProcess</name>
<description>Max requests handled by each FastCGI application</description>
<syntax>FcgidMaxRequestsPerProcess <em>value</em></syntax>
<default>FcgidMaxRequestsPerProcess 0</default>
<contextlist><context>server config</context> <context>virtual host</context></contextlist>
<usage>
<p>FastCGI application processes will be terminated after handling
the specified number of requests. A value of <code>0</code>
disables the check.</p>
<note type="hint"><title>Note</title>
<p>A value of <code>-1</code> is currently accepted for ease of
migration for existing configurations. It is treated the same as
<code>0</code>.</p>
</note>
<p>Certain applications, notably PHP as FastCGI, have their own
facility for terminating after handling a certain number of
requests. This directive can be used to avoid sending
additional requests to the application after it has handled its
limit.</p>
<note type="hint"><title>Note</title>
<p>If this is set such that frequent process creation will be
required, you will likely need to adjust
<directive module="mod_fcgid">FcgidSpawnScoreUpLimit</directive>
or other score-related directives to allow more frequent process
creation.</p>
</note>
<p>This setting will apply to all applications spawned for this
server or virtual host. Use
<directive module="mod_fcgid">FcgidCmdOptions</directive> to apply
this setting to a single application.</p>
</usage>
</directivesynopsis>
<directivesynopsis>
<name>FcgidOutputBufferSize</name>
<description>CGI output buffer size</description>
<syntax>FcgidOutputBufferSize <em>bytes</em></syntax>
<default>FcgidOutputBufferSize 65536</default>
<contextlist><context>server config</context> <context>virtual host</context></contextlist>
<usage>
<p>This is the maximum amount of response data the module will read
from the FastCGI application before flushing the data to the client.</p>
</usage>
</directivesynopsis>
<directivesynopsis>
<name>FcgidPassHeader</name>
<description>Header name which will be passed to FastCGI as environment variable.</description>
<syntax>FcgidPassHeader <em>name</em></syntax>
<default>none</default>
<contextlist><context>server config</context> <context>virtual host</context></contextlist>
<usage>
<p>This directive specifies the name of a request header which
will be passed to the FastCGI application as an environment
variable. The name of the environment variable is derived from
the value specified on this directive, as discussed below:</p>
<p>The legacy behavior is to use the value specified on this directive
as the environment variable name, converting hyphens to underscores.
No case conversion is performed.</p>
<p>Beginning with release 2.3.6, an additional environment variable
is created. The value specified on this directive is converted to
upper case, prefixed with <code>HTTP_</code>, and hyphens are
converted to underscores.</p>
<note type="hint"><title>Note</title>
<p>Most request headers are already available to the application
as environment variables, and generally are prefixed with
<code>HTTP_</code>. (Notable exceptions are <code>Content-type</code>
and <code>Content-length</code>, which do not have the
<code>HTTP_</code> prefix.) Thus, this directive is only required
for request headers that are purposefully omitted, such as
<code>Authorization</code> and <code>Proxy-Authorization</code>.
Only pass these request headers if absolutely required.</p>
</note>
</usage>
</directivesynopsis>
<directivesynopsis>
<name>FcgidFixPathinfo</name>
<description>Mirror the PHP <code>cgi.fix_pathinfo</code>
setting</description>
<syntax>FcgidFixPathinfo 1</syntax>
<default>FcgidFixPathinfo 0</default>
<contextlist><context>server config</context></contextlist>
<usage>
<p>This directive enables special <code>SCRIPT_NAME</code>
processing which allows PHP to provide additional path information.
The setting of <directive>FcgidFixPathinfo</directive>
should mirror the <code>cgi.fix_pathinfo</code> setting in
<code>php.ini</code>.</p>
</usage>
</directivesynopsis>
<directivesynopsis>
<name>FcgidProcessLifeTime</name>
<description>maximum FastCGI application process lifetime</description>
<syntax>FcgidProcessLifeTime <em>seconds</em></syntax>
<default>FcgidProcessLifeTime 3600</default>
<contextlist><context>server config</context> <context>virtual host</context></contextlist>
<usage>
<p>Idle application processes which have existed for greater
than this time will be terminated, if the number of processses for the
class exceeds
<directive module="mod_fcgid">FcgidMinProcessesPerClass</directive>.
A value of <code>0</code> disables the check.</p>
<p>This process lifetime check is performed at the frequency of the configured
<directive module="mod_fcgid">FcgidIdleScanInterval</directive>.</p>
<p>This setting will apply to all applications spawned for this
server or virtual host. Use
<directive module="mod_fcgid">FcgidCmdOptions</directive> to apply
this setting to a single application.</p>
</usage>
</directivesynopsis>
<directivesynopsis>
<name>FcgidProcessTableFile</name>
<description>shared memory file path</description>
<syntax>FcgidProcessTableFile <em>pathname</em></syntax>
<default>FcgidProcessTableFile logs/fcgid_shm</default>
<contextlist><context>server config</context></contextlist>
<usage>
<p>This module uses shared memory on Unix to maintain state which
is shared between httpd processes. This directive specifies the
name of the shared memory file.</p>
</usage>
</directivesynopsis>
<directivesynopsis>
<name>FcgidIPCDir</name>
<description>directory for AF_UNIX sockets (Unix) or pipes (Windows)</description>
<syntax>FcgidIPCDir <em>pathname</em></syntax>
<default>FcgidIPCDir logs/fcgidsock</default>
<contextlist><context>server config</context></contextlist>
<usage>
<p>This module uses AF_UNIX sockets or named pipes, depending on the
platform, to communicate with FastCGI applications. This directive
specifies the directory where those sockets or named pipes will be
created.</p>
</usage>
</directivesynopsis>
<directivesynopsis>
<name>FcgidSpawnScore</name>
<description>Each spawn adds this value to the process activity score.</description>
<syntax>FcgidSpawnScore <em>value</em></syntax>
<default>FcgidSpawnScore 1</default>
<contextlist><context>server config</context></contextlist>
<usage>
<p>Lower values of this directive increase the allowed spawn rate.</p>
<p>Refer to the <directive module="mod_fcgid">FcgidSpawnScoreUpLimit</directive>
directive for more information.</p>
</usage>
</directivesynopsis>
<directivesynopsis>
<name>FcgidSpawnScoreUpLimit</name>
<description>Maximum value of the process activity score which allows
a spawn to occur</description>
<syntax>FcgidSpawnScoreUpLimit <em>value</em></syntax>
<default>FcgidSpawnScoreUpLimit 10</default>
<contextlist><context>server config</context></contextlist>
<usage>
<p>A process activity score is maintained for each FastCGI application;
the score is used to control the rate of spawning in order to avoid
placing too much load on the system, particularly for applications that
are repeatedly exiting abnormally.</p>
<p>The value of <directive module="mod_fcgid">FcgidSpawnScore</directive>
is added to the score for every spawned application process. The value of
<directive module="mod_fcgid">FcgidTerminationScore</directive> is added
to the score for every terminated application process. The value of
<directive module="mod_fcgid">FcgidTimeScore</directive> is subtracted
from the score every second.</p>
<p>When the current score is higher than the value of
<directive>FcgidSpawnScoreUpLimit</directive>, no additional application
processes will be spawned; subsequent requests must wait until an existing
process is free or until the score decreases below the limit.</p>
<p>If the limit is reached under normal load, it may not be sufficient to
simply increase the limit, as that would only delay the amount of time
before the limit is reached again. Decrease the value of
<directive module="mod_fcgid">FcgidSpawnScore</directive> and/or
<directive module="mod_fcgid">FcgidTerminationScore</directive>, or
increase the value of <directive module="mod_fcgid">FcgidTimeScore</directive>,
to allow a higher rate of spawning.</p>
</usage>
</directivesynopsis>
<directivesynopsis>
<name>FcgidTerminationScore</name>
<description>Each terminated process adds this value to the process activity
score.</description>
<syntax>FcgidTerminationScore <em>value</em></syntax>
<default>FcgidTerminationScore 2</default>
<contextlist><context>server config</context></contextlist>
<usage>
<p>Lower values of this directive increase the allowed spawn rate. Negative
values can be useful in some circumstances, such as allowing process
replacement without increasing the score.</p>
<p>Refer to the <directive module="mod_fcgid">FcgidSpawnScoreUpLimit</directive>
directive for more information.</p>
</usage>
</directivesynopsis>
<directivesynopsis>
<name>FcgidTimeScore</name>
<description>Amount subtracted from process activity score each
second</description>
<syntax>FcgidTimeScore <em>value</em></syntax>
<default>FcgidTimeScore 1</default>
<contextlist><context>server config</context></contextlist>
<usage>
<p>Higher values of this directive increase the allowed spawn rate.</p>
<p>Refer to the <directive module="mod_fcgid">FcgidSpawnScoreUpLimit</directive>
directive for more information.</p>
</usage>
</directivesynopsis>
<directivesynopsis>
<name>FcgidWin32PreventOrphans</name>
<description>Job Control orphan prevention for fcgi workers.</description>
<syntax>FcgidWin32PreventOrphans <em>On|Off</em></syntax>
<default>FcgidWin32PreventOrphans Off</default>
<contextlist><context>server config</context></contextlist>
<usage>
<p>Uses Job Control Objects on Windows, only, to enforce shutdown of all
fcgi processes created by the httpd worker when the httpd worker has been
terminated. Processes terminated in this way do not have the opportunity
to clean up gracefully, complete pending disk writes, or similar closure
transactions, therefore this behavior is experimental and disabled, by
default.</p>
</usage>
</directivesynopsis>
<directivesynopsis>
<name>FcgidWrapper</name>
<description>The CGI wrapper setting</description>
<syntax>FcgidWrapper <em>command</em> [ <em>suffix</em> ] [ virtual ]</syntax>
<default>none</default>
<contextlist>
<context>server config</context> <context>virtual host</context>
<context>directory</context> <context>.htaccess</context>
</contextlist>
<override>FileInfo</override>
<usage>
<p>The given command is used to spawn FCGI server processes. If this directive
is not used, the file pointed to by the request URL will be used instead.
Options for the command can be included using quotation marks surrounding
the command and options.</p>
<p>The optional <code>suffix</code> argument restricts the use of this FCGI
server to all URLs with the given exact path suffix. A suffix needs to start
with '<code>.</code>'.</p>
<p>The <code>virtual</code> flag signals that there will be no check
whether the request URL actually points to an existing file. The only
file which needs to exist is the wrapper itself.</p>
<p>The directive can be used multiple times. A wrapper defined without a suffix
is used as a default in case no suffix matches.</p>
</usage>
</directivesynopsis>
<directivesynopsis>
<name>FcgidZombieScanInterval</name>
<description>scan interval for zombie process</description>
<syntax>FcgidZombieScanInterval <em>seconds</em></syntax>
<default>FcgidZombieScanInterval 3</default>
<contextlist><context>server config</context></contextlist>
<usage>
<p>The module checks for exited FastCGI applications at this interval.
During this period of time, the application may exist in the process
table as a zombie (on Unix).</p>
</usage>
</directivesynopsis>
</modulesynopsis>