How to determine which script is being executed in PHP-FPM process

Asked 22/2, 2013 at 11:48 Answered 28/7 at 20:41

I am running nginx + php-fpm. Is there any way how can I know what is each of the PHP processes doing? Something like extended mod_status in apache, where I can see that apache process with PID x is processing URL y. I'm not sure if the PHP process knows the URL, but getting the script path and name will be sufficient.

Bless answered 22/2, 2013 at 11:48 Comment(0)

After some googling hours and browsing PHP.net bug tracking system I have found the solution. It is available since PHP 5.3.8 or 5.3.9, but doesn't seem to be documented. Based on feature request #54577, the status page supports option full, which will display status of each worker separately. So for example the URL will be http://server.com/php-status?full and sample output looks like:

pid:                  22816
state:                Idle
start time:           22/Feb/2013:15:03:42 +0100
start since:          10933
requests:             28352
request duration:     1392
request method:       GET
request URI:          /ad.php?zID=597
content length:       0
user:                 -
script:               /home/web/server.com/ad/ad.php
last request cpu:     718.39
last request memory:  1310720

Bless answered 22/2, 2013 at 17:9 Comment(5)

Another very useful option is ?html, e.g.: server.com/php-status?full&html (it will format the output as html table, which makes it a lot easier to see all running scripts at once) – Sabah 26/5, 2014 at 13:37

how can i access it shoud i add any paramter to nginx config ? – Jeaz 28/9, 2015 at 14:11

@babakfaghihian yes, you need to pass that URL (/php-status for example) to php-fpm. – Bless 29/9, 2015 at 11:42

Unfortunately if your PHP app uses URL rewriting (aka 'friendly URLs'), which most MVC frameworks do, then request URI will always display as /index.php. The actual URL is passed in the REQUEST_URI env var which doesn't appear in the status output. – Runty 9/8, 2016 at 6:45

@Bless : Dude, you just saved my life ! I had been chasing some scripts that were eating up memory on my php-fpm container and had no luck with all the methods i had found...until this http://server.com/php-status?full That "?full" parameter just brought the light and showed me the faulty URIs/scripts i was looking after. Thank you very much ! – Gramps 3/11, 2017 at 23:42

PHP-FPM has a built in status monitor, though it's not as details as mod_status. From the php-fpm config file /etc/php-fpm.d/www.conf (on CentOS 6)

; The URI to view the FPM status page. If this value is not set, no URI will be
; recognized as a status page. By default, the status page shows the following
; information:
;   accepted conn    - the number of request accepted by the pool;
;   pool             - the name of the pool;
;   process manager  - static or dynamic;
;   idle processes   - the number of idle processes;
;   active processes - the number of active processes;
;   total processes  - the number of idle + active processes.
; The values of 'idle processes', 'active processes' and 'total processes' are
; updated each second. The value of 'accepted conn' is updated in real time.
; Example output:
;   accepted conn:   12073
;   pool:             www
;   process manager:  static
;   idle processes:   35
;   active processes: 65
;   total processes:  100
; By default the status page output is formatted as text/plain. Passing either
; 'html' or 'json' as a 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
; 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

If you enable this, you can then pass the path from nginx to your socket/port for PHP-FPM and you can view the status page.

nginx.conf:

location /status {

    include fastcgi_params;
    fastcgi_pass unix:/var/lib/php/php-fpm.sock;

}

Slaton answered 22/2, 2013 at 12:16 Comment(4)

yes I know about this status from php-fpm, I am already using it in munin and zabbix monitoring. However it provides only aggregate information and not per-process info. – Bless 22/2, 2013 at 12:26

Don't think there is much more you can do apart from creating a custom logging solution or setting up access log processing, but that wouldn't give you the detailed information you need such as processing time. I'm sure as PHP-FPM matures they will extend the status reporting. – Slaton 22/2, 2013 at 12:42

Finally I have found that the status page supports per-process info (see my answer). – Bless 22/2, 2013 at 17:9

what a horrible idea for the developers to make the debugging info available on a path like this. if you are doing this, make sure the url is restricted – Markley 16/7, 2022 at 10:12

cgi command line is more convinient:

SCRIPT_NAME=/status \
SCRIPT_FILENAME=/status \
REQUEST_METHOD=GET \
cgi-fcgi -bind -connect 127.0.0.1:9000

Diestock answered 10/11, 2014 at 3:50 Comment(2)

Also note that you must add QUERY_STRING=full to return what OP is looking for. Changing SCRIPT_FILENAME to /status?full doesn't work. – Imputable 1/4, 2015 at 17:17

You will still need to enable the status page by uncommenting pm.status_path; the advantage to this method is that it doesn't need to be exposed by the web server. SCRIPT_NAME and SCRIPT_FILENAME should be the same as pm.status_path from the php-fpm.conf file. That last parameter (127.0.0.1:9000) is the connection to the FCGI server, not the web server--it should be whatever the listen parameter is in that same INI file. If it's a socket, you may need to use sudo to connect, in which case also use -E to tell sudo to pass through the environment variables to cgi-fcgi. – Tatianna 23/4, 2017 at 22:50

You can use strace to show the scripts being run - and many other things - in real time. It's pretty verbose, but it can give you a good overall picture of what's going on:

# switch php-fpm7.0 for process you're using
sudo strace -f $(pidof php-fpm7.0 | sed 's/\([0-9]*\)/\-p \1/g')

The above will attach to the forked processes of php fpm. Use -p to attach to a particular pid.

The above would get the scrip path. To get the urls, you would look at your nginx / apache access logs.

As a side note, to see the syscalls and which ones are taking longest:

sudo strace -c -f $(pidof php-fpm7.0 | sed 's/\([0-9]*\)/\-p \1/g')

Wait a while, then hit Ctr-C

Glaab answered 11/4, 2018 at 4:24 Comment(1)

This works strace -f $(pidof php-fpm | sed 's/$[0-9]*$/\-p \1/g') – Farmland 7/10, 2019 at 10:0

There is also a PHP function called fpm_get_status()

<?php print_r(fpm_get_status()); ?>

Vivica answered 28/7 at 20:41 Comment(0)

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