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Увеличение latency при старте nginx


  • To: nginx-ru@xxxxxxxxx
  • Subject: Увеличение latency при старте nginx
  • From: "aageyev" <nginx-forum@xxxxxxxx>
  • Date: Tue, 28 May 2013 20:37:17 -0400
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Здравствуйте.

Столкнулся с достаточно загадочной для меня ситуацией.

Ping сервера с выключенным nginx 

icmp_req=9 ttl=61 time=0.652 ms

Через 3 минуты после старта nginx 

icmp_req=129 ttl=61 time=229 ms


Сервер используется под хостинг wordpress
OS: Ubuntu 12.10

nginx.conf
user www-data;
worker_processes 4;
worker_rlimit_nofile 250000;
pid /var/run/nginx.pid;

events {
        worker_connections 4096;
        multi_accept on;
        use epoll;
}

http {
        include                       /etc/nginx/mime.types;
        default_type                  application/octet-stream;
        server_names_hash_bucket_size 512;
        reset_timedout_connection     on;
        resolver                      127.0.0.1;
        resolver_timeout              10s;

        open_file_cache                max=100000 inactive=40s;
        open_file_cache_valid          60s;
        open_file_cache_min_uses       2;
        open_file_cache_errors         on;

        access_log                     off;
        server_tokens                  off;
        sendfile                       off;
        tcp_nopush                     off;
        keepalive_timeout              10;
        tcp_nodelay                    off;
        send_timeout                   2;
        gzip                           off;
        client_header_buffer_size      4k;
        large_client_header_buffers    8 8k;
        output_buffers                 32 512k;
        sendfile_max_chunk             128k;
        postpone_output                1460;

        log_format main '$remote_addr - $remote_user [$time_local] $domain
'
                    '"$request" $status $body_bytes_sent '
                    '"$http_referer" "$http_user_agent"';

        include /etc/nginx/conf.d/*.conf;
        include /etc/nginx/sites-enabled/*;
}



Server-conf
server {
       listen   80 default_server;

        server_name   ~^(www\.)?(?<domain>.+)$;

        access_log /var/log/nginx/wp-access.log csv buffer=1m;
        error_log  /var/log/nginx/wp-error.log;
        
        root   /var/www/$domain;

        index index.php;

        location ~ \.(css|js|htc)$ {
                access_log off;
                log_not_found off;
        }
        location ~ \.(html|htm|rtf|rtx|svg|svgz|txt|xsd|xsl|xml)$ {
        }

        location = /favicon.ico { access_log off; log_not_found off; }
        location = /robots.txt { access_log off; log_not_found off; }
        location = /apple-touch-icon.png { access_log off; log_not_found off; }
        location = /apple-touch-icon-precomposed.png { access_log off;
log_not_found off; }

        location = /wp-content {
                access_log        off;
                expires           max;
        }
        #    Common deny or internal locations, to help prevent access to areas 
of
        #    the site that should not be public

        location ~* wp-admin/includes { deny all; }
        location ~* wp-includes/theme-compat/ { deny all; }
        location ~* wp-includes/js/tinymce/langs/.*\.php { deny all; }

        location /wp-includes/ { internal; }

        location ~* wp-config.php { deny all; }

        #location ~* ^/wp-content/uploads/.*.(html|htm|shtml|php)$ {
        #       types { }
        #       default_type text/plain;
        #}

        location ~ /\. { deny  all; access_log off; log_not_found off; }

        location / {
            try_files $uri $uri/ /index.php;
        }

        location ~ \.php$ {
            fastcgi_pass              php5-fpm-sock;
            fastcgi_index             index.php;
            fastcgi_param             SCRIPT_FILENAME
$document_root$fastcgi_script_name;
            proxy_ignore_client_abort on;
            proxy_connect_timeout     120;
            proxy_read_timeout        60;
            proxy_send_timeout        60;
            proxy_buffers             8 32k;
            proxy_buffer_size         64k;
            include                   /etc/nginx/fastcgi_params;
        }
}

В логах nginx и syslog ничего аномального нет.

Подскажите, пожалуйста, с чем это может быть связанно и в какую сторону
копать?

Заранее спасибо.

Posted at Nginx Forum: 
http://forum.nginx.org/read.php?21,239645,239645#msg-239645

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