nginx as Loadbalancer loading page somtimes not complete

[misael]

hi nginx users,

first of all i like to thank you for this great application,
i recently used nginx for my community  forum  backend with vbulletin, 
and the average user online are 10.000 users.
the problems was, sometimes our visitor can't load the page 
(post/thread) at full page.
i use -RELEASE FreeBSD 7.0-RELEASE with dual Quad 2 core processors and 
8GB RAM.
and here  is my nginx.conf:
----snip----

user  www;
worker_processes  4;
worker_rlimit_nofile 200000;
error_log  /var/log/error.log warn;

events {
    worker_connections  102400;
    use kqueue;
}


http {

    include       mime.types;
    default_type  application/octet-stream;

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


    sendfile        on;
    tcp_nopush     on;
        client_header_timeout          10m;
        client_body_timeout                    10m;
        send_timeout                           10m;
        connection_pool_size            256;
        client_header_buffer_size       1k;
        large_client_header_buffers     4 8k;
        request_pool_size                       4k;
        ignore_invalid_headers          on;

    reset_timedout_connection on;
    keepalive_timeout  0;
    tcp_nodelay on;
    gzip  on;
    gzip_proxied any;
    gzip_vary on;
    gzip_comp_level 9;
    gzip_min_length 1100;
    gzip_http_version 1.0;
    gzip_buffers 4 8k;
    gzip_types text/plain text/html text/css application/x-javascript 
text/xml application/xml application/xml+rss text/javascript;
    output_buffers 1 32k;
    postpone_output 1460;



   server_names_hash_max_size 4096;
   server_names_hash_bucket_size 128;

   upstream foobar {
        ip_hash;
        server 10.10.1.9:80; #weight=1;  # pong6
        server 10.10.1.22:80; #weight=2;  # web1
        server 10.10.1.3:80; #weight=2;   # web2
        server 10.10.1.5:80; #weight=1;   # web4
        server 10.10.1.6:80; #weight=2;   # web5
    }

    server {
        listen  80 default rcvbuf=8192 sndbuf=16384;
        client_max_body_size       50m;

        server_name foobar.org;


        if ($host = "foobar.org"){
        rewrite ^(.*)$ http://www.foobar.org$1 permanent;
        break;
        }

        error_page  404              /404.html;

        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   /usr/local/www/nginx-dist;
        }

           location ~ "^/" {
           index  index.php index.htm index.html;
            proxy_ignore_client_abort   on;
            proxy_buffering     on;
            proxy_next_upstream timeout;
           client_max_body_size       10m;
            client_body_buffer_size    1024k;
            proxy_connect_timeout       75;
            proxy_read_timeout          300;
            proxy_buffer_size          256k;
            proxy_buffers              128 256k;
            proxy_busy_buffers_size    512k;
            proxy_temp_file_write_size 1024k;
            proxy_redirect     off;
            proxy_set_header    Host             $host;
            proxy_set_header X-Forwarded-For $remote_addr;
            proxy_set_header   X-Real-IP        $remote_addr;
            proxy_set_header   X-Forwarded-For  $proxy_add_x_forwarded_for;
            proxy_pass  http://foobar;
        }

    }
}



----snip---
and there were no error log regarding this problem,

only these few warn msg (which i'm not sure what does it mean)

----snip---

2009/02/26 10:44:39 [warn] 99639#0: *6265776 a client request body is 
buffered to a temporary file /var/tmp/nginx/client_body_temp/0000000000 
while sending request to upstream, client: 125.163.1.248, server: 
kaskus.us, request: "POST /newreply.php?do=postreply&t=866095 HTTP/1.1", 
upstream: "http://10.10.1.5:80/newreply.php?do=postreply&t=866095", 
host: "www.foobar.org", referrer: 
"http://www.foobar.org/newreply.php?do=postreply&t=866095"
114.58.83.207, server: kaskus.us, request: "POST 
/ajax.php?do=verifyusername HTTP/1.1", upstream: 
"http://10.10.1.9:80/ajax.php?do=verifyusername", host: 
"www.foobar.org", referrer: "http://www.foobar.org/register.php?do=register"
----snip----

i need to find the solution for this problem,
and i hope all the nginx gurus here would be so kind enough to help me

and sorry for my poor english

Regards

Zen





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