Edit report at https://bugs.php.net/bug.php?id=52569&edit=1
ID: 52569
Comment by: f...@php.net
Reported by: mplomer at gmx dot de
Summary: Implement "ondemand" process-manager (to allow zero
children)
Status: Analyzed
Type: Feature/Change Request
Package: FPM related
PHP Version: 5.3.3
Assigned To: fat
Block user comment: N
Private report: N
New Comment:
To sum up the patch:
1- new configuration:
* in globals: events.delay (default 500µs). It's the delay between 2 triggers
on a FD event. You can disable the delay by setting it to 0. You should change
it when the ondemand PM
forks more child than it should do.
* in pools: pm = "ondemand" to active the ondemand PM. In this mode, no
processes are forked at startup but when requests are comming
* in pools: pm.process_idle_timeout the time a process should stay idle
without serving any requests before it's killed
2- Here is the debug log I have when setting log_level to debug, error_log to
/dev/stderr and daemonize to no:
[10-Jul-2011 18:58:14.207987] DEBUG: pid 11370, fpm_scoreboard_init_main(),
line 40: got clock tick '100'
[10-Jul-2011 18:58:14.208169] DEBUG: pid 11370, fpm_event_init_main(), line
239: 11 fds have been reserved
[10-Jul-2011 18:58:14.208177] NOTICE: pid 11370, fpm_init(), line 77: fpm is
running, pid 11370
[10-Jul-2011 18:58:14.208189] DEBUG: pid 11370, fpm_event_loop(), line 266:
5984 bytes have been reserved in SHM
[10-Jul-2011 18:58:14.208194] DEBUG: pid 11370, fpm_event_loop(), line 267:
events.delay = 500
[10-Jul-2011 18:58:14.208197] NOTICE: pid 11370, fpm_event_loop(), line 268:
ready to handle connections
[10-Jul-2011 18:58:15.208565] DEBUG: pid 11370,
fpm_pctl_perform_idle_server_maintenance(), line 362: [pool direct] currently 0
active children, 0 spare children
[10-Jul-2011 18:58:16.208945] DEBUG: pid 11370,
fpm_pctl_perform_idle_server_maintenance(), line 362: [pool direct] currently 0
active children, 0 spare children
[10-Jul-2011 18:58:16.778599] DEBUG: pid 11370, fpm_children_make(), line 411:
[pool direct] child 11371 started
[10-Jul-2011 18:58:16.778615] DEBUG: pid 11370, fpm_pctl_on_socket_accept(),
line 532: [pool direct] got accept without idle child available .... I forked
[10-Jul-2011 18:58:17.209294] DEBUG: pid 11370,
fpm_pctl_perform_idle_server_maintenance(), line 362: [pool direct] currently 0
active children, 1 spare children
[10-Jul-2011 18:58:18.209631] DEBUG: pid 11370,
fpm_pctl_perform_idle_server_maintenance(), line 362: [pool direct] currently 0
active children, 1 spare children
[10-Jul-2011 18:58:19.210035] DEBUG: pid 11370,
fpm_pctl_perform_idle_server_maintenance(), line 362: [pool direct] currently 0
active children, 1 spare children
[10-Jul-2011 18:58:20.210382] DEBUG: pid 11370,
fpm_pctl_perform_idle_server_maintenance(), line 362: [pool direct] currently 0
active children, 1 spare children
[10-Jul-2011 18:58:21.210751] DEBUG: pid 11370,
fpm_pctl_perform_idle_server_maintenance(), line 362: [pool direct] currently 0
active children, 1 spare children
[10-Jul-2011 18:58:22.211264] DEBUG: pid 11370,
fpm_pctl_perform_idle_server_maintenance(), line 362: [pool direct] currently 0
active children, 1 spare children
[10-Jul-2011 18:58:23.211732] DEBUG: pid 11370,
fpm_pctl_perform_idle_server_maintenance(), line 362: [pool direct] currently 0
active children, 1 spare children
[10-Jul-2011 18:58:24.212057] DEBUG: pid 11370,
fpm_pctl_perform_idle_server_maintenance(), line 362: [pool direct] currently 0
active children, 1 spare children
[10-Jul-2011 18:58:25.212462] DEBUG: pid 11370,
fpm_pctl_perform_idle_server_maintenance(), line 362: [pool direct] currently 0
active children, 1 spare children
[10-Jul-2011 18:58:26.212763] DEBUG: pid 11370,
fpm_pctl_perform_idle_server_maintenance(), line 362: [pool direct] currently 0
active children, 1 spare children
[10-Jul-2011 18:58:27.213155] DEBUG: pid 11370,
fpm_pctl_perform_idle_server_maintenance(), line 362: [pool direct] currently 0
active children, 1 spare children
[10-Jul-2011 18:58:27.221542] DEBUG: pid 11370, fpm_got_signal(), line 76:
received SIGCHLD
[10-Jul-2011 18:58:27.221575] DEBUG: pid 11370, fpm_children_bury(), line 254:
[pool direct] child 11371 has been killed by the process managment after
10.442991 seconds from start
[10-Jul-2011 18:58:28.214082] DEBUG: pid 11370,
fpm_pctl_perform_idle_server_maintenance(), line 362: [pool direct] currently 0
active children, 0 spare children
[10-Jul-2011 18:58:29.214542] DEBUG: pid 11370,
fpm_pctl_perform_idle_server_maintenance(), line 362: [pool direct] currently 0
active children, 0 spare children
[10-Jul-2011 18:58:30.214972] DEBUG: pid 11370,
fpm_pctl_perform_idle_server_maintenance(), line 362: [pool direct] currently 0
active children, 0 spare children
Previous Comments:
------------------------------------------------------------------------
[2011-07-10 12:32:11] trollofdarkness at gmail dot com
Hello,
Ok so it is normal.
I think it would be great to make a short sum up of what's been introduced in
the FPM configuration by this patch, and what behaviour of what already
existing config directive has been modified. I read the entire bug file, but
did not completely understand what's been modified / introduced about the
config directives.
To answer your question I am running Debian Lenny 64bits. PHP has been compiled
successfully from the last SVN sources (5.3 branch). And as I said, I used both
Apache2 and Nginx, I tried with both sockets and host:ip methods and is has
exactly the same behaviour with the two methods :
When FPM starts, no process is launched for the given pool (ok, that's right)
When a request comes... the web server handles it, passes it to FPM ... But
after, I don't know, I did not see anything shocking in the log file... And
absolutly no process is started by FPM. So the request waits until the
webserver finally decides that FPM is not responding correctly and displays an
error message instead (after at least 1 minute, so that's not about FPM being
slow or something like that).
Thanks in advance.
Troll
------------------------------------------------------------------------
[2011-07-10 11:02:38] f...@php.net
pm.min_delay_between_fork has been removed since the version 9 of the patch.
This
is normal :)
which OS/version are you using ?
------------------------------------------------------------------------
[2011-07-09 11:47:29] trollofdarkness at gmail dot com
I think I get the same problem as dbetz .
I am using sockets (one per website) with both Apache2 and Nginx. Neither with
the first nor the second it worked.
I tried with the use of ip:port instead of sockets but it is exactly the
same...
I've no idea where it comes from.
------------------------------------------------------------------------
[2011-07-09 11:08:15] trollofdarkness at gmail dot com
Hello everyone,
I tried patching the last 5.3 SVN branch with the patch. All went well (config,
compile, etc. ...). But after restarting php-fpm I get that :
Starting php-fpm [09-Jul-2011 16:57:37] ERROR: [/usr/local/etc/php-fpm.conf:27]
unknown entry 'pm.min_delay_between_fork'
Which is pretty strange because the other options are not showing any error :
This works :
[mypool]
pm = ondemand
pm.process_idle_timeout = 10
# plus the other config lines...
But this, will show the previous error message :
[mypool]
pm = ondemand
pm.process_idle_timeout = 10
pm.min_delay_between_fork = 10000 # this to avoid the known bug
# plus the other config lines...
Any idea ?
Else, beside that, if I use the pm = ondemand , there is absolutly no process
forked. Neither at the beginning, nor after, when a request comes...
However, pm=dynamic & pm=static still works well... ??
------------------------------------------------------------------------
[2011-07-09 08:33:10] f...@php.net
Here is a new release of the patch which is supposed to correct the double fork
bug.
I've moved pm.min_delay_between_fork to the event layer and it's now defined in
the global section as events.delay (default 500µs)
------------------------------------------------------------------------
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