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[Web] 请教关于php-fpm出现 SIGCHLD的问题 [复制链接]

huzi1986

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发表于 2009-04-01 14:46 |只看该作者 |倒序浏览

现一生产服务器，连接数目一大就会出现如下信息。php-fpm.log里面一直会有这样的信息

[root@www logs]# tail php-fpm.log
Apr 01 14:38:13.942822 [NOTICE] fpm_children_make(), line 352: child 14084 (pool default) started
Apr 01 14:38:14.138072 [NOTICE] fpm_got_signal(), line 48: received SIGCHLD
Apr 01 14:38:14.138153 [NOTICE] fpm_children_bury(), line 215: child 13956 (pool default) exited with code 0 after 98.509143 seconds from start
Apr 01 14:38:14.138846 [NOTICE] fpm_children_make(), line 352: child 14085 (pool default) started
Apr 01 14:38:16.545035 [NOTICE] fpm_got_signal(), line 48: received SIGCHLD
Apr 01 14:38:16.545122 [NOTICE] fpm_children_bury(), line 215: child 13958 (pool default) exited with code 0 after 96.974407 seconds from start
Apr 01 14:38:16.545674 [NOTICE] fpm_children_make(), line 352: child 14086 (pool default) started
Apr 01 14:38:19.133433 [NOTICE] fpm_got_signal(), line 48: received SIGCHLD
Apr 01 14:38:19.133512 [NOTICE] fpm_children_bury(), line 215: child 13957 (pool default) exited with code 0 after 101.740640 seconds from start
Apr 01 14:38:19.134466 [NOTICE] fpm_children_make(), line 352: child 14087 (pool default) started
[root@www logs]#

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采用的是nginx+php-cgi ,nginx 0.7.27 php-5.2.8

fcgi.conf 配置

fastcgi_param GATEWAY_INTERFACE CGI/1.1;
fastcgi_param SERVER_SOFTWARE nginx;
fastcgi_param QUERY_STRING $query_string;
fastcgi_param REQUEST_METHOD $request_method;
fastcgi_param CONTENT_TYPE $content_type;
fastcgi_param CONTENT_LENGTH $content_length;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
fastcgi_param SCRIPT_NAME $fastcgi_script_name;
fastcgi_param REQUEST_URI $request_uri;
fastcgi_param DOCUMENT_URI $document_uri;
fastcgi_param DOCUMENT_ROOT $document_root;
fastcgi_param SERVER_PROTOCOL $server_protocol;
fastcgi_param REMOTE_ADDR $remote_addr;
fastcgi_param REMOTE_PORT $remote_port;
fastcgi_param SERVER_ADDR $server_addr;
fastcgi_param SERVER_PORT $server_port;
fastcgi_param SERVER_NAME $server_name;
# PHP only, required if PHP was built with --enable-force-cgi-redirect
fastcgi_param REDIRECT_STATUS 200;

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php-fpm.conf配置

<?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/php/logs/php-fpm.pid</value>
Error log file
<value name="error_log">/usr/local/php/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">60</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"></value>
<value name="group"></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">1</value>
</value>
Unix user of processes
<value name="user">www</value>
Unix group of processes
<value name="group">www</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">128</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">51200</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">500</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>

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连接状态

[root@www logs]# netstat -an | grep 80 | awk '{print $6}' | sort | uniq -c | sort -rn
  21182 ESTABLISHED
4103 TIME_WAIT
1571 FIN_WAIT2
1465 FIN_WAIT1
293 LAST_ACK
134 SYN_RECV
   24 CONNECTED
   17 SYN_SENT
   12 CLOSING
   1 LISTEN
[root@www logs]# netstat -an | grep 9000 | awk '{print $6}' | sort | uniq -c | sort -rn
1522 TIME_WAIT
270 SYN_SENT
   19 ESTABLISHED
   4 SYN_RECV
   1 LISTEN
   1 LAST_ACK
   1 FIN_WAIT1
   1 CLOSE_WAIT
[root@www logs]#

请各位帮忙提下建议