Config:Php-fpm-pool-commented

Start a new pool named 'www'.
the variable $pool can we used in any directive and will be replaced by the
pool name ('www' here)

[www]

Per pool prefix
It only applies on the following directives
- 'access.log'
- 'slowlog'
- 'listen' (unixsocket)
- 'chroot'
- 'chdir'
- 'php_values'
- 'php_admin_values'
When not set, the global prefix (or @php_fpm_prefix@) applies instead.
Note: This directive can also be relative to the global prefix.
Default Value: none
prefix = /path/to/pools/$pool

Unix user/group of processes
Note: The user is mandatory. If the group is not set, the default user's group
will be used.
RPM: apache user chosen to provide access to the same directories as httpd

user = apache

RPM: Keep a group allowed to write in log dir.

group = apache

The address on which to accept FastCGI requests.
Valid syntaxes are
'ip.add.re.ss: port' - to listen on a TCP socket to a specific IPv4 address on
a specific port;
'[ip: 6:addr:ess]:port' - to listen on a TCP socket to a specific IPv6 address on
a specific port;
'port' - to listen on a TCP socket to all addresses
(IPv6 and IPv4-mapped) on a specific port;
'/path/to/unix/socket' - to listen on a unix socket.
Note: This value is mandatory.

listen = /run/php-fpm/www.sock

Set listen(2) backlog.
Default Value: 511
listen.backlog = 511

Set permissions for unix socket, if one is used. In Linux, read/write
permissions must be set in order to allow connections from a web server.
Default Values: user and group are set as the running user
mode is set to 0660

listen.owner = apache listen.group = apache

listen.mode = 0660

When POSIX Access Control Lists are supported you can set them using
these options, value is a comma separated list of user/group names.
When set, listen.owner and listen.group are ignored
listen.acl_users = apache,nginx
listen.acl_groups =

List of addresses (IPv4/IPv6) of FastCGI clients which are allowed to connect.
Equivalent to the FCGI_WEB_SERVER_ADDRS environment variable in the original
PHP FCGI (5.2.2+). Makes sense only with a tcp listening socket. Each address
must be separated by a comma. If this value is left blank, connections will be
accepted from any ip address.
Default Value: any

listen.allowed_clients = 127.0.0.1

Specify the nice(2) priority to apply to the pool processes (only if set)
The value can vary from -19 (highest priority) to 20 (lower priority)
Note: - It will only work if the FPM master process is launched as root
- The pool processes will inherit the master process priority
unless it specified otherwise
Default Value: no set
process.priority = -19

Choose how the process manager will control the number of child processes.
Possible Values
static - a fixed number (pm.max_children) of child processes;
dynamic - the number of child processes are set dynamically based on the
following directives. With this process management, there will be
always at least 1 children.
pm.max_children - the maximum number of children that can
be alive at the same time.
pm.start_servers - the number of children created on startup.
pm.min_spare_servers - the minimum number of children in 'idle'
state (waiting to process). If the number
of 'idle' processes is less than this
number then some children will be created.
pm.max_spare_servers - the maximum number of children in 'idle'
state (waiting to process). If the number
of 'idle' processes is greater than this
number then some children will be killed.
ondemand - no children are created at startup. Children will be forked when
new requests will connect. The following parameter are used
pm.max_children - the maximum number of children that
can be alive at the same time.
pm.process_idle_timeout - The number of seconds after which
an idle process will be killed.
Note: This value is mandatory.

pm = dynamic

The number of child processes to be created when pm is set to 'static' and the
maximum number of child processes when pm is set to 'dynamic' or 'ondemand'.
This value sets the limit on the number of simultaneous requests that will be
served. Equivalent to the ApacheMaxClients directive with mpm_prefork.
Equivalent to the PHP_FCGI_CHILDREN environment variable in the original PHP
CGI. The below defaults are based on a server without much resources. Don't
forget to tweak pm.* to fit your needs.
Note: Used when pm is set to 'static', 'dynamic' or 'ondemand'
Note: This value is mandatory.

pm.max_children = 50

The number of child processes created on startup.
Note: Used only when pm is set to 'dynamic'
Default Value: min_spare_servers + (max_spare_servers - min_spare_servers) / 2

pm.start_servers = 5

The desired minimum number of idle server processes.
Note: Used only when pm is set to 'dynamic'
Note: Mandatory when pm is set to 'dynamic'

pm.min_spare_servers = 5

The desired maximum number of idle server processes.
Note: Used only when pm is set to 'dynamic'
Note: Mandatory when pm is set to 'dynamic'

pm.max_spare_servers = 35

The number of seconds after which an idle process will be killed.
Note: Used only when pm is set to 'ondemand'
Default Value: 10s
pm.process_idle_timeout = 10s;

The number of requests each child process should execute before respawning.
This can be useful to work around memory leaks in 3rd party libraries. For
endless request processing specify '0'. Equivalent to PHP_FCGI_MAX_REQUESTS.
Default Value: 0
pm.max_requests = 500

The URI to view the FPM status page. If this value is not set, no URI will be
recognized as a status page. It shows the following informations
pool - the name of the pool;
process manager - static, dynamic or ondemand;
start time - the date and time FPM has started;
start since - number of seconds since FPM has started;
accepted conn - the number of request accepted by the pool;
listen queue - the number of request in the queue of pending
connections (see backlog in listen(2));
max listen queue - the maximum number of requests in the queue
of pending connections since FPM has started;
listen queue len - the size of the socket queue of pending connections;
idle processes - the number of idle processes;
active processes - the number of active processes;
total processes - the number of idle + active processes;
max active processes - the maximum number of active processes since FPM
has started;
max children reached - number of times, the process limit has been reached,
when pm tries to start more children (works only for
pm 'dynamic' and 'ondemand');
Value are updated in real time.
Example output
pool: www
process manager: static
start time: 01/Jul/2011:17:53:49 +0200
start since: 62636
accepted conn: 190460
listen queue: 0
max listen queue: 1
listen queue len: 42
idle processes: 4
active processes: 11
total processes: 15
max active processes: 12
max children reached: 0

By default the status page output is formatted as text/plain. Passing either
'html', 'xml' or 'json' in the query string will return the corresponding
output syntax. Example
http://www.foo.bar/status
http://www.foo.bar/status?json
http://www.foo.bar/status?html
http://www.foo.bar/status?xml

By default the status page only outputs short status. Passing 'full' in the
query string will also return status for each pool process.
Example
http://www.foo.bar/status?full
http://www.foo.bar/status?json&full
http://www.foo.bar/status?html&full
http://www.foo.bar/status?xml&full
The Full status returns for each process
pid - the PID of the process;
state - the state of the process (Idle, Running, ...);
start time - the date and time the process has started;
start since - the number of seconds since the process has started;
requests - the number of requests the process has served;
request duration - the duration in ?s of the requests;
request method - the request method (GET, POST, ...);
request URI - the request URI with the query string;
content length - the content length of the request (only with POST);
user - the user (PHP_AUTH_USER) (or '-' if not set);
script - the main script called (or '-' if not set);
last request cpu - the %cpu the last request consumed
it's always 0 if the process is not in Idle state
because CPU calculation is done when the request
processing has terminated;
last request memory - the max amount of memory the last request consumed
it's always 0 if the process is not in Idle state
because memory calculation is done when the request
processing has terminated;
If the process is in Idle state, then informations are related to the
last request the process has served. Otherwise informations are related to
the current request being served.
Example output
************************
pid: 31330
state: Running
start time: 01/Jul/2011:17:53:49 +0200
start since: 63087
requests: 12808
request duration: 1250261
request method: GET
request URI: /test_mem.php?N=10000
content length: 0
user: -
script: /home/fat/web/docs/php/test_mem.php
last request cpu: 0.00
last request memory: 0

Note: There is a real-time FPM status monitoring sample web page available
It's available in: @EXPANDED_DATADIR@/fpm/status.html

Note: The value must start with a leading slash (/). The value can be
anything, but it may not be a good idea to use the .php extension or it
may conflict with a real PHP file.
Default Value: not set

pm.status_path = /status

The ping URI to call the monitoring page of FPM. If this value is not set, no
URI will be recognized as a ping page. This could be used to test from outside
that FPM is alive and responding, or to
- create a graph of FPM availability (rrd or such);
- remove a server from a group if it is not responding (load balancing);
- trigger alerts for the operating team (24/7).
Note: The value must start with a leading slash (/). The value can be
anything, but it may not be a good idea to use the .php extension or it
may conflict with a real PHP file.
Default Value: not set
ping.path = /ping

This directive may be used to customize the response of a ping request. The
response is formatted as text/plain with a 200 response code.
Default Value: pong
ping.response = pong

The access log file
Default: not set
access.log = log/$pool.access.log

The access log format.
The following syntax is allowed
%%: the '%' character
%C: %CPU used by the request
it can accept the following format
- %{user}C for user CPU only
- %{system}C for system CPU only
- %{total}C for user + system CPU (default)
%d: time taken to serve the request
it can accept the following format
- %{seconds}d (default)
- %{miliseconds}d
- %{mili}d
- %{microseconds}d
- %{micro}d
%e: an environment variable (same as $_ENV or $_SERVER)
it must be associated with embraces to specify the name of the env
variable. Some exemples
- server specifics like: %{REQUEST_METHOD}e or %{SERVER_PROTOCOL}e
- HTTP headers like: %{HTTP_HOST}e or %{HTTP_USER_AGENT}e
%f: script filename
%l: content-length of the request (for POST request only)
%m: request method
%M: peak of memory allocated by PHP
it can accept the following format
- %{bytes}M (default)
- %{kilobytes}M
- %{kilo}M
- %{megabytes}M
- %{mega}M
%n: pool name
%o: output header
it must be associated with embraces to specify the name of the header
- %{Content-Type}o
- %{X-Powered-By}o
- %{Transfert-Encoding}o
- ....
%p: PID of the child that serviced the request
%P: PID of the parent of the child that serviced the request
%q: the query string
%Q: the '?' character if query string exists
%r: the request URI (without the query string, see %q and %Q)
%R: remote IP address
%s: status (response code)
%t: server time the request was received
it can accept a strftime(3) format
%d/%b/%Y: %H:%M:%S %z (default)
The strftime(3) format must be encapsuled in a %{<strftime_format>}t tag
e.g. for a ISO8601 formatted timestring, use: %{%Y-%m-%dT%H:%M:%S%z}t
%T: time the log has been written (the request has finished)
it can accept a strftime(3) format
%d/%b/%Y: %H:%M:%S %z (default)
The strftime(3) format must be encapsuled in a %{<strftime_format>}t tag
e.g. for a ISO8601 formatted timestring, use: %{%Y-%m-%dT%H:%M:%S%z}t
%u: remote user

Default: "%R - %u %t \"%m %r\" %s"
access.format = "%R - %u %t \"%m %r%Q%q\" %s %f %{mili}d %{kilo}M %C%%"

The log file for slow requests
Default Value: not set
Note: slowlog is mandatory if request_slowlog_timeout is set

slowlog = /var/log/php-fpm/www-slow.log

The timeout for serving a single request after which a PHP backtrace will be
dumped to the 'slowlog' file. A value of '0s' means 'off'.
Available units: s(econds)(default), m(inutes), h(ours), or d(ays)
Default Value: 0
request_slowlog_timeout = 0

The timeout for serving a single request after which the worker process will
be killed. This option should be used when the 'max_execution_time' ini option
does not stop script execution for some reason. A value of '0' means 'off'.
Available units: s(econds)(default), m(inutes), h(ours), or d(ays)
Default Value: 0
request_terminate_timeout = 0

Set open file descriptor rlimit.
Default Value: system defined value
rlimit_files = 1024

Set max core size rlimit.
Possible Values: 'unlimited' or an integer greater or equal to 0
Default Value: system defined value
rlimit_core = 0

Chroot to this directory at the start. This value must be defined as an
absolute path. When this value is not set, chroot is not used.
Note: you can prefix with '$prefix' to chroot to the pool prefix or one
of its subdirectories. If the pool prefix is not set, the global prefix
will be used instead.
Note: chrooting is a great security feature and should be used whenever
possible. However, all PHP paths will be relative to the chroot
(error_log, sessions.save_path, ...).
Default Value: not set
chroot =

Chdir to this directory at the start.
Note: relative path can be used.
Default Value: current directory or / when chroot
chdir = /var/www

Redirect worker stdout and stderr into main error log. If not set, stdout and
stderr will be redirected to /dev/null according to FastCGI specs.
Note: on highloaded environement, this can cause some delay in the page
process time (several ms).
Default Value: no
catch_workers_output = yes

Clear environment in FPM workers
Prevents arbitrary environment variables from reaching FPM worker processes
by clearing the environment in workers before env vars specified in this
pool configuration are added.
Setting to "no" will make all environment variables available to PHP code
via getenv(), $_ENV and $_SERVER.
Default Value: yes
clear_env = no

Limits the extensions of the main script FPM will allow to parse. This can
prevent configuration mistakes on the web server side. You should only limit
FPM to .php extensions to prevent malicious users to use other extensions to
exectute php code.
Note: set an empty value to allow all extensions.
Default Value: .php
security.limit_extensions = .php .php3 .php4 .php5 .php7

security.limit_extensions =

Pass environment variables like LD_LIBRARY_PATH. All $VARIABLEs are taken from
the current environment.
Default Value: clean env
env[HOSTNAME] = $HOSTNAME
env[PATH] = /usr/local/bin: /usr/bin:/bin
env[TMP] = /tmp
env[TMPDIR] = /tmp
env[TEMP] = /tmp

Additional php.ini defines, specific to this pool of workers. These settings
overwrite the values previously defined in the php.ini. The directives are the
same as the PHP SAPI
php_value/php_flag - you can set classic ini defines which can
be overwritten from PHP call 'ini_set'.
php_admin_value/php_admin_flag - these directives won't be overwritten by
PHP call 'ini_set'
For php_*flag, valid values are on, off, 1, 0, true, false, yes or no.

Defining 'extension' will load the corresponding shared extension from
extension_dir. Defining 'disable_functions' or 'disable_classes' will not
overwrite previously defined php.ini values, but will append the new value
instead.

Note: path INI options can be relative and will be expanded with the prefix
(pool, global or @prefix@)

Default Value: nothing is defined by default except the values in php.ini and
specified at startup with the -d argument
php_admin_value[sendmail_path] = /usr/sbin/sendmail -t -i -f www@my.domain.com
php_flag[display_errors] = off

php_admin_value[error_log] = /var/log/php-fpm/$pool-error.log php_admin_flag[log_errors] = on

php_admin_value[memory_limit] = 128M

Set the following data paths to directories owned by the FPM process user.

Do not change the ownership of existing system directories, if the process
user does not have write permission, create dedicated directories for this
purpose.

See warning about choosing the location of these directories on your system
at http://php.net/session.save-path

php_value[session.save_handler] = files php_value[session.save_path] = /var/lib/php/session php_value[soap.wsdl_cache_dir] = /var/lib/php/wsdlcache

php_value[opcache.file_cache] = /var/lib/php/opcache

</syntaxhighligh>