nginx+apaches+lighttpd - не пойму где затык

user nginx;

worker_processes 16;
worker_priority -10;

error_log /var/log/nginx/error.log notice;
pid /var/run/nginx.pid;

timer_resolution 100ms;
worker_rlimit_nofile 8192;

events {
worker_connections 2048;
use epoll;
}


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

log_format IP ‘$remote_addr’;

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


access_log /var/log/nginx/access.log main;

limit_conn_zone $binary_remote_addr zone=myzone:10m;
proxy_cache_path /var/cache/nginx levels=2 keys_zone=pagecache:5m inactive=10m max_size=50m;
proxy_cache off;
proxy_connect_timeout 90;
proxy_send_timeout 90;
proxy_read_timeout 90;
client_body_buffer_size 128k;
# proxy_buffer_size 4k;
# proxy_buffers 4 32k;
proxy_buffers 16 32k;
proxy_buffer_size 64k;
proxy_busy_buffers_size 64k;
proxy_temp_file_write_size 64k;
client_header_buffer_size 16k;
client_max_body_size 2048M;
open_file_cache max=512 inactive=86400s;
open_file_cache_valid 21600s;
open_file_cache_min_uses 1;
open_file_cache_errors off;


output_buffers 32 64k;
postpone_output 1460;

lingering_time 30;
lingering_timeout 10;
reset_timedout_connection on;

client_header_timeout 90;
client_body_timeout 90;

expires 2m;
keepalive_timeout 60;
send_timeout 10m;

ignore_invalid_headers on;
# resolver dns_ip;
keepalive_requests 100;
limit_conn_zone $binary_remote_addr zone=gulag:5m;
recursive_error_pages on;
sendfile on;
server_name_in_redirect on;
server_tokens off;

tcp_nodelay on;
tcp_nopush on;

gzip off;
gzip_disable "MSIE [1-6]\.";
gzip_comp_level 3;
gzip_min_length 1100;
gzip_buffers 4 64k;
gzip_http_version 1.1;
gzip_proxied any;
gzip_types text/plain application/xml application/x-javascript text/css;

server {
server_name host www.host;
listen 0.0.0.0:80;

if ($host = 'host' ) { rewrite ^/(.*)$ http://www.host/$1 permanent; }

location ~* ^.+\.(jpg|jpeg|gif|flv|png|css|zip|tgz|gz|rar|bz2|doc|xls|exe|pdf|ppt|txt|tar|wav|bmp|rtf|js|ico|swf)$ {
access_log off;
error_log /var/log/nginx/host.kg.error.log;
root /srv/data/www/host;
# proxy_pass http://static;
# proxy_set_header Host $host;
# proxy_set_header IP $remote_addr;
# proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
# proxy_set_header X-Forwarded-Proto $scheme;
# proxy_set_header X-Real-IP $remote_addr;
}
location / {
proxy_pass http://192.168.50.1:8081;
proxy_redirect http://192.168.50.1:8081/ /;
proxy_set_header Host $host;
proxy_set_header IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_set_header X-Real-IP $remote_addr;
access_log /var/log/nginx/host.dyn.access.log upstreams;
}
}
upstream static {
server 192.168.50.5:8080 max_fails=3 fail_timeout=30s;
server 192.168.50.4:8080 max_fails=3 fail_timeout=30s;
server 192.168.50.1:8081 backup;
server 192.168.50.3:8081 backup;
}

upstream apaches {
server 192.168.50.1:8081 max_fails=3 fail_timeout=30s;
server 192.168.50.3:8081 max_fails=3 fail_timeout=30s;
}
}