wordpress - Nginx performance problems -

i having performance problems website. configuration 1g vps wordpress/nginx/php-fpm on ubuntu 11.04. bottleneck when browser waiting first byte server. takes 4-6 secs waiting first response server after initiating connection (the website new , receives low traffic currenlty , 50-150 visit/day). following nginx conf, hope may understanding problem is. want know if there wrong configuration may optimized. if can recommend me profiling/analysis tools use suits configuration.

note: replaced username myusername, domain mydomain.com

nginx.conf

user myusername; worker_processes 4; pid /var/run/nginx.pid;  events {     worker_connections 768;     # multi_accept on; }  http {           index index.php index.html index.htm;      sendfile on;     # tcp_nopush on;     tcp_nodelay on;     keepalive_timeout 5;     types_hash_max_size 2048;     # server_tokens off;      # server_names_hash_bucket_size 64;     # server_name_in_redirect off;      include /etc/nginx/mime.types;     default_type application/octet-stream;      client_max_body_size 50m;       access_log /var/log/nginx/access.log;     error_log /var/log/nginx/error.log;      gzip on;     gzip_disable "msie6";      # gzip_vary on;     # gzip_proxied any;     # gzip_comp_level 6;     # gzip_buffers 16 8k;     # gzip_http_version 1.1;     # gzip_types text/plain text/css application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript;      ##     # virtual host configs     ##      include /etc/nginx/conf.d/*.conf;     include /etc/nginx/sites-enabled/*; } 

sites-enabled/default

server {      listen   80; ## listen ipv4; line default , implied     listen   [::]:80 default ipv6only=on; ## listen ipv6 root /home/myusername/www;  # make site accessible http://localhost/ server_name mydomain.com;  location / {     # first attempt serve request file,     # directory, fall index.html     try_files $uri $uri/ /index.php; }  location /doc {     # root /usr/share;     autoindex on;     allow 127.0.0.1;     deny all; }  location /images {     # root /usr/share;     autoindex off; }  error_page 404 = @wordpress; log_not_found off;  location @wordpress {         fastcgi_pass 127.0.0.1:9000;         fastcgi_param script_filename $document_root/index.php;         include /etc/nginx/fastcgi_params;         fastcgi_param script_name /index.php; }  location ^~ /files/ {         rewrite /files/(.+) /wp-includes/ms-files.php?file=$1 last;     }   # redirect server error pages static page /50x.html # #error_page 500 502 503 504 /50x.html; #location = /50x.html { #   root /usr/share/nginx/www; #}  # proxy php scripts apache listening on 127.0.0.1:80 # #location ~ \.php$ { #   proxy_pass http://127.0.0.1; #}  # pass php scripts fastcgi server listening on 127.0.0.1:9000 # location ~ \.php$ {         try_files $uri @wordpress;         fastcgi_index index.php;         fastcgi_pass 127.0.0.1:9000;         fastcgi_param script_filename $document_root$fastcgi_script_name;         include /etc/nginx/fastcgi_params; }  # deny access .htaccess files, if apache's document root # concurs nginx's 1 # location ~ /\.ht {     deny all; } location ^~ /blogs.dir/ {         internal;         root /home/myusername/www/wp-content;     } } 

looks wordpress site, i'd lean more towards being performance problem there nginx config itself.

some recommendations:

1 - make sure have apc installed , enabled

2 - install server-side caching plugin (w3 total cache or supercache) , configure use apc backing store (and turn on of caching layers)

as far profilers go, i'm huge fan of newrelic , pro level free first 2 weeks (usually long enough find hot spots) basic performance information free forever.