I just switched from spawn-fcgi tis morning and so far so good but I
want to make sure that I'm getting the best performance for my setup.

I'm getting over half a million pageviews per day. mysqld is on a
separate box. I'm running 8 workers and 8192 worker_connections on
nginx btw.

Here it is my config:

<?xml version="1.0" ?>
<configuration>

All relative paths in this config are relative to php's install
prefix

<section name="global_options">

Pid file
<value name="pid_file">/usr/local/logs/php-fpm.pid</value>

Error log file
<value name="error_log">/usr/local/logs/php-fpm.log</value>

Log level
<value name="log_level">notice</value>

When this amount of php processes exited with SIGSEGV or SIGBUS ...
<value name="emergency_restart_threshold">10</value>

... in a less than this interval of time, a graceful restart will be
initiated.
Useful to work around accidental curruptions in accelerator's shared
memory.
<value name="emergency_restart_interval">1m</value>

Time limit on waiting child's reaction on signals from master
<value name="process_control_timeout">5s</value>

Set to 'no' to debug fpm
<value name="daemonize">yes</value>

</section>

<workers>

<section name="pool">

Name of pool. Used in logs and stats.
<value name="name">default</value>

Address to accept fastcgi requests on.
Valid syntax is 'ip.ad.re.ss:port' or just 'port' or '/path/to/unix/
socket'
<value name="listen_address">127.0.0.1:9000</value>

<value name="listen_options">

Set listen(2) backlog
<value name="backlog">-1</value>

Set permissions for unix socket, if one used.
In Linux read/write permissions must be set in order to allow
connections from web server.
Many BSD-derrived systems allow connections regardless of
permissions.
<value name="owner">ng</value>
<value name="group">ng</value>
<value name="mode">0666</value>
</value>

Additional php.ini defines, specific to this pool of workers.
<value name="php_defines">
<!-- <value name="sendmail_path">/usr/sbin/sendmail -t -i</
value> -->
<!-- <value name="display_errors">0</value> -->
</value>

Unix user of processes
<value name="user">ng</value>

Unix group of processes
<value name="group">ng</value>

Process manager settings
<value name="pm">

Sets style of controling worker process count.
Valid values are 'static' and 'apache-like'
<value name="style">static</value>

Sets the limit on the number of simultaneous requests that will be
served.
Equivalent to Apache MaxClients directive.
Equivalent to PHP_FCGI_CHILDREN environment in original php.fcgi
Used with any pm_style.
<value name="max_children">16</value>

Settings group for 'apache-like' pm style
<value name="apache_like">

Sets the number of server processes created on startup.
Used only when 'apache-like' pm_style is selected
<value name="StartServers">20</value>

Sets the desired minimum number of idle server processes.
Used only when 'apache-like' pm_style is selected
<value name="MinSpareServers">5</value>

Sets the desired maximum number of idle server processes.
Used only when 'apache-like' pm_style is selected
<value name="MaxSpareServers">35</value>

</value>

</value>

The timeout (in seconds) for serving a single request after which
the worker process will be terminated
Should be used when 'max_execution_time' ini option does not stop
script execution for some reason
'0s' means 'off'
<value name="request_terminate_timeout">0s</value>

The timeout (in seconds) for serving of single request after which
a php backtrace will be dumped to slow.log file
'0s' means 'off'
<value name="request_slowlog_timeout">0s</value>

The log file for slow requests
<value name="slowlog">logs/slow.log</value>

Set open file desc rlimit
<value name="rlimit_files">8192</value>

Set max core size rlimit
<value name="rlimit_core">0</value>

Chroot to this directory at the start, absolute path
<value name="chroot"></value>

Chdir to this directory at the start, absolute path
<value name="chdir"></value>

Redirect workers' stdout and stderr into main error log.
If not set, they will be redirected to /dev/null, according to
FastCGI specs
<value name="catch_workers_output">yes</value>

How much requests each process should execute before respawn.
Useful to work around memory leaks in 3rd party libraries.
For endless request processing please specify 0
Equivalent to PHP_FCGI_MAX_REQUESTS
<value name="max_requests">10000</value>

Comma separated list of ipv4 addresses of FastCGI clients that
allowed to connect.
Equivalent to FCGI_WEB_SERVER_ADDRS environment in original
php.fcgi (5.2.2+)
Makes sense only with AF_INET listening socket.
<value name="allowed_clients">127.0.0.1</value>

Pass environment variables like LD_LIBRARY_PATH
All $VARIABLEs are taken from current environment
<value name="environment">
<value name="HOSTNAME">$HOSTNAME</value>
<value name="PATH">/usr/local/bin:/usr/bin:/bin</value>
<value name="TMP">/tmp</value>
<value name="TMPDIR">/tmp</value>
<value name="TEMP">/tmp</value>
<value name="OSTYPE">$OSTYPE</value>
<value name="MACHTYPE">$MACHTYPE</value>
<value name="MALLOC_CHECK_">2</value>
</value>

</section>

</workers>

</configuration>

If I understand correctly how php-fpm works (which I probably dont)
double my max_children would be a good idea. Am I right?

I have 6 gb of RAM. Almost 4 of them are free right now.

Any suggestions are welcome!


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On Tue, Apr 6, 2010 at 11:11 AM, wminside <wminside@wminside.com> wrote:
> I just switched from spawn-fcgi tis morning and so far so good but I
> want to make sure that I'm getting the best performance for my setup.
>
> I'm getting over half a million pageviews per day. mysqld is on a
> separate box. I'm running 8 workers and 8192 worker_connections on
> nginx btw.
>

>                                Sets the limit on the number of simultaneous requests that will be
> served.
>                                Equivalent to Apache MaxClients directive.
>                                Equivalent to PHP_FCGI_CHILDREN environment in original php.fcgi
>                                Used with any pm_style.
>                                <value name="max_children">16</value>

> If I understand correctly how php-fpm works (which I probably dont)
> double my max_children would be a good idea. Am I right?
>
> I have 6 gb of RAM. Almost 4 of them are free right now.
>
> Any suggestions are welcome!

You should be able to set max_children to the same as spawn-fcgi was
configured for if that performed well. But you can bump that up a bit
too, if you have extra resources and want more to be available in case
you get hit with a bump more of traffic..


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