lnmp之php-fpm+nginx+ulimit的综合设置之故障排除

相信其它的地方大家都懂，这里重点说下面粗体注释标注部分 参数设置必须与系统的 ulimit -Sn 参数一致，并且 php-fpm.conf,nginx,conf中的设置要一致，否则会出现诸多历史遗留问题以及不和谐的ERROR WRING问题

以下是nginx.conf里的一些 配置信息，重点说红色部分

#user  nobody;user www www;worker_processes  auto;#add by Happy; set the value == system's ulimit -sn 's value

#############################################<strong>worker_rlimit_nofile 65535;</strong>############################################

error_log  logs/error.log;#error_log  logs/error.log  notice;#error_log  logs/error.log  info;pid        logs/nginx.pid;events {    # set by Happy; set the value == system's "ulimit -sn" is value    # if use is epoll,the worker_connections 65535+1  but sys's ulimit -sn == 65536

############################################    <strong>worker_connections 65535;</strong>

############################################

    multi_accept  on;    use  epoll;}http {    include       mime.types;    default_type  application/octet-stream;    # add by Happy 2014-04-18    server_names_hash_bucket_size  128;    client_header_buffer_size      32K;    large_client_header_buffers    4 32k;    # set user upload size    client_max_body_size           8m;    # add end     log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '                      '$status $body_bytes_sent "$http_referer" '                      '"$http_user_agent" "$http_x_forwarded_for"';    access_log  logs/access.log main;    #display nginx version add this,    #but you have set fastcgi.conf set     #fastcgi_param SERVER_SOFTWARE nginx/$nginx_version;    #fastcgi_param SERVER_SOFTWARE nginx;    #this is by Happy set for 2014-04-19    server_tokens off;    sendfile       on;    #tcp_nopush     on;    tcp_nopush	   on;    tcp_nodelay    on;    #add by Happy 2014-04-19    fastcgi_connect_timeout    300;    fastcgi_send_timeout       300;    fastcgi_read_timeout       300;    fastcgi_buffer_size        64k;    fastcgi_buffers         4  64k;    fastcgi_busy_buffers_size  128k;    fastcgi_temp_file_write_size  128k;    #keepalive_timeout  0;    keepalive_timeout  60;    client_header_timeout  10;    client_body_timeout  10;    #reset_timeout_connection  on;    send_timeout  10;    #set one ip link num and memory    limit_conn_zone $binary_remote_addr zone=addr:5m;    limit_conn addr 100;    #open gzip by Happy    gzip  on;    gzip_disable      "msie6";    gzip_proxied      any;    gzip_min_length   1k;    gzip_buffers      4  16k;    #if you set squid2.x,please set 1.0    #by Happy set 2014-04-19    gzip_http_version 1.1;     gzip_comp_level   4;    gzip_types text/plain text/css application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript;    gzip_vary        on;    ## add by Happy,set 2014-04-23    #xian zhi dan ge IP  bing fa wei 10 ge    limit_conn_zone  $binary_remote_addr zone=happy:10m;    limit_conn happy 20;    #xian zhi lian jie su du, da yu 1m de wen jian xian su 100k/s    #if you user's one link down file's size > 1M,the set user one down is 100k/S    limit_rate_after 1m;    limit_rate       200k;    #open_file_cache max=100000 inactive=60s;    #open_file_cache_valid 65s;    #open_file_cache_min_uses 2;    #open_file_cache_errors off;    server {        listen       80 default;        server_name  www.xxxx.cn xxx.cn;	#charset  utf-8;        access_log  logs/host.access.log;        location / {	            #root   html;	    root   /home/var/www;	    index  index.php index.html index.htm;	    if (!-e $request_filename) {	    	rewrite ^(.*) /index.php last;	    }	}        location ~* \.(?:gif|ico|jpe?g|png|swf|bmp|swf)$ {            expires 30d;            log_not_found off;            ## No need to bleed constant updates. Send the all shebang in one            #            #    fell swoop.            #            tcp_nodelay off;            #            #    Set the OS file cache.            #            open_file_cache max=1000 inactive=120s;            open_file_cache_valid 125s;            open_file_cache_min_uses 2;            open_file_cache_errors off;	    root /home/var/www;            #        }        location ~* \.(js|css)$ {            expires   1d;            root /home/var/www;        }	#error_page  404              /404.html;        # redirect server error pages to the static page /50x.html        #        error_page   500 502 503 504  /50x.html;        location = /50x.html {            root   html;        }        # proxy the PHP scripts to Apache listening on 127.0.0.1:80        #        #location ~ \.php$ {        #    proxy_pass   http://127.0.0.1;        #}        # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000        #        location ~ \.php$ {	    #root   html;            root           /home/var/www;            if (!-e $request_filename) {                rewrite (.*) /index.php last;	    }	    fastcgi_pass   127.0.0.1:9000;            fastcgi_index  index.php;            #fastcgi_param  SCRIPT_FILENAME  /scripts$fastcgi_script_name;            fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;	    include        fastcgi_params;        }        # deny access to .htaccess files, if Apache's document root        # concurs with nginx's one        #        location ~ /\.ht {            deny  all;        }	location ~*\.(html|log|sh|bash)?$ {	    return 403;	}        location ~ ^/home/var/www/MVC/ {            deny  all;            break;        }        #return 500;	    }    # another virtual host using mix of IP-, name-, and port-based configuration    #    #server {    #    listen       8000;    #    listen       somename:8080;    #    server_name  somename  alias  another.alias;    #    location / {    #        root   html;    #        index  index.html index.htm;    #    }    #}    # HTTPS server    #    #server {    #    listen       443;    #    server_name  localhost;    #    ssl                  on;    #    ssl_certificate      cert.pem;    #    ssl_certificate_key  cert.key;    #    ssl_session_timeout  5m;    #    ssl_protocols  SSLv2 SSLv3 TLSv1;    #    ssl_ciphers  HIGH:!aNULL:!MD5;    #    ssl_prefer_server_ciphers   on;    #    location / {    #        root   html;    #        index  index.html index.htm;    #    }    #}}

PHP-FPM中的rlimit_files参数设置需同系统参数一致且同nginx 里的connections，rlimit参数相呼应，否则大流量并发下会出现如5xx,4xx等意象不到的错误状态

（这里只说红色粗体部分，其它的日后再解，相信大家一定也都懂得其它参数的设置）

;;;;;;;;;;;;;;;;;;;;;; FPM Configuration ;;;;;;;;;;;;;;;;;;;;;;; All relative paths in this configuration file are relative to PHP's install; prefix (/usr/local/php). This prefix can be dynamically changed by using the; '-p' argument from the command line.; Include one or more files. If glob(3) exists, it is used to include a bunch of; files from a glob(3) pattern. This directive can be used everywhere in the; file.; Relative path can also be used. They will be prefixed by:;  - the global prefix if it's been set (-p argument);  - /usr/local/php otherwise;include=etc/fpm.d/*.conf;;;;;;;;;;;;;;;;;;; Global Options ;;;;;;;;;;;;;;;;;;;[global]; Pid file; Note: the default prefix is /usr/local/php/var; Default Value: none;default disabled,show 2014-04-18 by Happypid = run/php-fpm.pid; Error log file; If it's set to "syslog", log is sent to syslogd instead of being written; in a local file.; Note: the default prefix is /usr/local/php/var; Default Value: log/php-fpm.log;default disabled,show 2014-04-18 by Happyerror_log = log/php-fpm.log; syslog_facility is used to specify what type of program is logging the; message. This lets syslogd specify that messages from different facilities; will be handled differently.; See syslog(3) for possible values (ex daemon equiv LOG_DAEMON); Default Value: daemon;syslog.facility = daemon; syslog_ident is prepended to every message. If you have multiple FPM; instances running on the same server, you can change the default value; which must suit common needs.; Default Value: php-fpm;syslog.ident = php-fpm; Log level; Possible Values: alert, error, warning, notice, debug; Default Value: notice;default disabled,show 2014-04-18 by Happylog_level = notice; If this number of child processes exit with SIGSEGV or SIGBUS within the time; interval set by emergency_restart_interval then FPM will restart. A value; of '0' means 'Off'.; Default Value: 0;emergency_restart_threshold = 0; Interval of time used by emergency_restart_interval to determine when ; a graceful restart will be initiated.  This can be useful to work around; accidental corruptions in an accelerator's shared memory.; Available Units: s(econds), m(inutes), h(ours), or d(ays); Default Unit: seconds; Default Value: 0;emergency_restart_interval = 0; Time limit for child processes to wait for a reaction on signals from master.; Available units: s(econds), m(inutes), h(ours), or d(ays); Default Unit: seconds; Default Value: 0;default disabled,show 2014-04-18 by Happy ;process_control_timeout = 0; The maximum number of processes FPM will fork. This has been design to control; the global number of processes when using dynamic PM within a lot of pools.; Use it with caution.; Note: A value of 0 indicates no limit; Default Value: 0; process.max = 128; Specify the nice(2) priority to apply to the master process (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 process will inherit the master process priority;         unless it specified otherwise; Default Value: no set; process.priority = -19; Send FPM to background. Set to 'no' to keep FPM in foreground for debugging.; Default Value: yes;hou tai zhixing php-fpm default disabled,show 2014-04-18 by Happydaemonize = yes ; Set open file descriptor rlimit for the master process.; Default Value: system defined value;rlimit_files = 1024 ; Set max core size rlimit for the master process.; Possible Values: 'unlimited' or an integer greater or equal to 0; Default Value: system defined value;rlimit_core = 0; Specify the event mechanism FPM will use. The following is available:; - select     (any POSIX os); - poll       (any POSIX os); - epoll      (linux >= 2.5.44); - kqueue     (FreeBSD >= 4.1, OpenBSD >= 2.9, NetBSD >= 2.0); - /dev/poll  (Solaris >= 7); - port       (Solaris >= 10); Default Value: not set (auto detection);events.mechanism = epoll; When FPM is build with systemd integration, specify the interval,; in second, between health report notification to systemd.; Set to 0 to disable.; Available Units: s(econds), m(inutes), h(ours); Default Unit: seconds; Default value: 10;systemd_interval = 10;;;;;;;;;;;;;;;;;;;;; Pool Definitions ; ;;;;;;;;;;;;;;;;;;;;; Multiple pools of child processes may be started with different listening; ports and different management options.  The name of the pool will be; used in logs and stats. There is no limitation on the number of pools which; FPM can handle. Your system will tell you anyway :); Start a new pool named 'www'.; the variable $pool can we used in any directive and will be replaced by the; pool name ('www' here)[www]; Per pool prefix; It only applies on the following directives:; - 'slowlog'; - 'listen' (unixsocket); - 'chroot'; - 'chdir'; - 'php_values'; - 'php_admin_values'; When not set, the global prefix (or /usr/local/php) applies instead.; Note: This directive can also be relative to the global prefix.; Default Value: none;prefix = /path/to/pools/$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.user = wwwgroup = www; 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 address on;                            a specific port;;   'port'                 - to listen on a TCP socket to all addresses on a;                            specific port;;   '/path/to/unix/socket' - to listen on a unix socket.; Note: This value is mandatory.listen = 127.0.0.1:9000; Set listen(2) backlog.; Default Value: 65535 (-1 on FreeBSD and OpenBSD);listen.backlog = 65535; 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. Many; BSD-derived systems allow connections regardless of permissions. ; Default Values: user and group are set as the running user;;                 mode is set to 0666;default disabled ,show 2014-04-18 by Happylisten.owner = wwwlisten.group = wwwlisten.mode = 0666;2014-04-18 shown END ; List of ipv4 addresses 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;default disabled,show 2014-04-18 by Happylisten.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; 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 = 30; 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) / 2pm.start_servers = 12; 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 = 1 1.5G set 2,2G set 2 2014-04-18 BY Happypm.min_spare_servers = 4; 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';default pm.max_spare_servers = 3, 1.5G set 8,2G set 10 by 2014-04-18 by Happypm.max_spare_servers = 20; 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;default disabled set 500,show 2014-04-18 by Happypm.max_requests = 1000; 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 µs 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: ${prefix}/share/fpm/status.html;; Note: The value must start with a leading slash (/). The value can be;       anything, but it may not be a good idea to use the .php extension or it;       may conflict with a real PHP file.; Default Value: not set ;pm.status_path = /status ; The ping URI to call the monitoring page of FPM. If this value is not set, no; URI will be recognized as a ping page. This could be used to test from outside; that FPM is alive and responding, or to; - create a graph of FPM availability (rrd or such);; - remove a server from a group if it is not responding (load balancing);; - trigger alerts for the operating team (24/7).; Note: The value must start with a leading slash (/). The value can be;       anything, but it may not be a good idea to use the .php extension or it;       may conflict with a real PHP file.; Default Value: not set;ping.path = /ping; This directive may be used to customize the response of a ping request. The; response is formatted as text/plain with a 200 response code.; Default Value: pong;ping.response = pong; The access log file; Default: not set;access.log = log/$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 $_SERVER);      it must be associated with embraces to specify the name of the env;      variable. Some exemples:;      - server specifics like: %{REQUEST_METHOD}e or %{SERVER_PROTOCOL}e;      - HTTP headers like: %{HTTP_HOST}e or %{HTTP_USER_AGENT}e;  %f: script filename;  %l: content-length of the request (for POST request only);  %m: request method;  %M: peak of memory allocated by PHP;      it can accept the following format:;      - %{bytes}M (default);      - %{kilobytes}M;      - %{kilo}M;      - %{megabytes}M;      - %{mega}M;  %n: pool name;  %o: output header;      it must be associated with embraces to specify the name of the header:;      - %{Content-Type}o;      - %{X-Powered-By}o;      - %{Transfert-Encoding}o;      - ....;  %p: PID of the child that serviced the request;  %P: PID of the parent of the child that serviced the request;  %q: the query string ;  %Q: the '?' character if query string exists;  %r: the request URI (without the query string, see %q and %Q);  %R: remote IP address;  %s: status (response code);  %t: server time the request was received;      it can accept a strftime(3) format:;      %d/%b/%Y:%H:%M:%S %z (default);  %T: time the log has been written (the request has finished);      it can accept a strftime(3) format:;      %d/%b/%Y:%H:%M:%S %z (default);  %u: remote user;; Default: "%R - %u %t \"%m %r\" %s";access.format = "%R - %u %t \"%m %r%Q%q\" %s %f %{mili}d %{kilo}M %C%%" ; The log file for slow requests; Default Value: not set; Note: slowlog is mandatory if request_slowlog_timeout is set; if you open slowlog(man cha xun rizhi),the slowlog path is set;by Happy;slowlog = log/$pool.log.slowslowlog = /usr/local/php/var/log/php-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;if you php thread time > the time,write php bad log;by Happy 2014-04-20request_slowlog_timeout = 2s ; 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;if you php thread time > the time,close  the php script thread ;by Happy 2014-04-20request_terminate_timeout = 30s ; Set open file descriptor rlimit.; Default Value: system defined value;set the value === system ulimit -Sn 65535 

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;<strong>rlimit_files = 65535</strong>

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

 ; 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 ; 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 /usr/local/php); 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/fpm-php.www.log;php_admin_flag[log_errors] = on;php_admin_value[memory_limit] = 32M

下面说说出现的错误和一些情况：

nginx connections ,rlimits 跟php-fpm的rlimit_files 的参数配置 要与ulimit -n系统参数的连接数配置一致 

如果系统 参数比nginx 设置小的话 会出现 4XX,5xx错误，

还有 就是刚编译好的系统环境 默认ulimit -Sn 参数值只有 1024 个，1024 不能满足NGINX需求 测试并发时候怎么测试到了1024以后就4XX,5XX错误了，最后修改了系统内核参数 为16位 二进制最大数 也就是 65535 

failed to ptrace(PEEKDATA) pid 20160: Input/output error
php-fpm的rlimit_files参数 如果比系统的ulimit 小的话出现如上这个ERROR

nginx的参数设置如果比系统ulimit -sn 的参数值小的 话nginx 容易出现 5xx 错误

解决方案就是统一修改 php-fpm.conf,nginx.conf,与系统ulimit -sn 的 参数一致，如果 系统ulimt 的默认参数是1024的话，一定要修改掉他，修改为65535 即可，同时php-fpm,nginx的rlimit  参数也要与其一致……