请教一个web server的问题。

tzm529

将之前的一台服务器换成了centos 5.6，上面跑着nginx1.0.2 + php5.3.6 (fastcgi)。
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现在的情况是当我使用移动的宽带访问网站时,经常出现页面加载一小部分就终止了。在未换成centos之前，用移动的打开很慢，但至少能加载完成。而现在直接就加载一半就完了。。
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在网上找了N久，一直不解。现贴上相关的配置文件，忘各位帮忙分析分析，先在此谢过了。
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1。修改过后的/etc/sysctl.conf配置文件:
net.ipv4.ip_forward = 0
net.ipv4.conf.default.rp_filter = 1
net.ipv4.conf.default.accept_source_route = 0
kernel.sysrq = 0
kernel.core_uses_pid = 1
net.ipv4.tcp_syncookies = 1
kernel.msgmnb = 65536
kernel.msgmax = 65536
kernel.shmmax = 68719476736
segments, in pages
kernel.shmall = 4294967296

net.ipv4.tcp_max_syn_backlog = 262144
net.core.netdev_max_backlog = 262144
net.core.somaxconn = 262144

net.ipv4.tcp_rmem = 4096 87380 4194304
net.ipv4.tcp_wmem = 4096 87380 4194304
net.core.wmem_default = 8388608
net.core.rmem_default = 8388608
net.core.rmem_max = 16777216
net.core.wmem_max = 16777216

net.ipv4.tcp_timestamps = 0
net.ipv4.tcp_synack_retries = 1
net.ipv4.tcp_syn_retries = 1

net.ipv4.tcp_max_tw_buckets = 6000
net.ipv4.tcp_sack = 1
net.ipv4.tcp_window_scaling = 1
net.ipv4.tcp_tw_recycle = 1
#net.ipv4.tcp_tw_len = 1
net.ipv4.tcp_tw_reuse = 1

net.ipv4.tcp_mem = 94500000 915000000 927000000
net.ipv4.tcp_max_orphans = 3276800

net.ipv4.tcp_keepalive_time = 30
net.ipv4.ip_local_port_range = 1024 65535
net.ipv4.tcp_syncookies=1
net.ipv4.tcp_fin_timeout = 1
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2。配置的nginx.conf如下:

user www www;
worker_processes  16;

error_log  error.log crit;


pid        nginx.pid;

worker_rlimit_nofile 65535;

events {
    use epoll;
    worker_connections  65535;
}


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

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

    server_names_hash_bucket_size 128;
    server_name_in_redirect off;
    server_tokens off;
    client_header_buffer_size 32k;
    #client_header_buffer_size 4k;
    large_client_header_buffers 4 32k;
    client_max_body_size 8m;
    sendfile        on;
    tcp_nopush     on;
    keepalive_timeout  65;
    tcp_nodelay on;
    open_file_cache max=65535 inactive=20s;
    open_file_cache_valid 30s;
    open_file_cache_min_uses 1;
    client_body_timeout 10;
    client_header_timeout 10;
    send_timeout 60;
    #output_buffers 132k;   (这个跟postpone_output不太明白意思，而且output_buffers在nginx1.0.2下报错)
    postpone_output 1460;

    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;
    fastcgi_cache_valid 301 1d;

    gzip_static on;
    gzip on;
    gzip_min_length  1k;
    gzip_buffers     4 16k;
    gzip_http_version 1.0;
    gzip_comp_level 3;
    gzip_types      text/plain application/x-javascript text/css application/xml;
    gzip_vary on;
}
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再一次感谢。