我使用CentOS 6.4 64位的VPS。有运行Nginx 1.4.4和PHP-FPM 5.5.6。我正在尝试进行长轮询请求。但是，如果服务器已在处理一个请求，则他不会响应其他请求。这意味着，如果我有脚本：
sleep(60);
PHP不处理其他请求。我必须等待60秒。 PHP状态页面是：
pool: www
process manager: dynamic
start time: 26/Nov/2013:22:02:00 +0100
start since: 148
accepted conn: 170
listen queue: 0
max listen queue: 0
listen queue len: 128
idle processes: 1
active processes: 49
total processes: 50
max active processes: 49
max children reached: 1
slow requests: 0
和je conf.d / www.conf：
[www]
listen.allowed_clients = 127.0.0.1
user = apache
group = apache
pm = dynamic
pm.max_children = 50
pm.start_servers = 5
pm.min_spare_servers = 5
pm.max_spare_servers = 35
pm.max_requests = 500
pm.status_path = /status
slowlog = /var/log/php-fpm/www-slow.log
php_admin_value[error_log] = /var/log/php-fpm/www-error.log
php_admin_flag[log_errors] = on
php_value[session.save_handler] = files
php_value[session.save_path] = /var/lib/php/session
php_value[soap.wsdl_cache_dir] = /var/lib/php/wsdlcache