调整nginx以获得更好的性能

这个configuration怎么样？ 无论如何，我可以调整它来处理更快，更好的点击？ 即时通讯坐在2GB的RAM和四核心

user nobody; worker_processes 4; error_log /var/log/nginx/error.log debug; worker_rlimit_nofile 32768; events { worker_connections 8192; # increase for busier servers use epoll; # you should use epoll here for Linux kernels 2.6.x multi_accept on; } http { server_name_in_redirect off; server_names_hash_max_size 2048; server_names_hash_bucket_size 256; include mime.types; default_type application/octet-stream; server_tokens off; sendfile on; tcp_nopush on; tcp_nodelay on; keepalive_timeout 15; gzip on; gzip_vary on; gzip_disable "MSIE [1-6]\."; gzip_proxied any; gzip_http_version 1.1; gzip_min_length 0; gzip_comp_level 9; gzip_buffers 16 8k; gzip_types text/* application/* image/*; open_file_cache max=1000 inactive=20s; open_file_cache_valid 30s; open_file_cache_min_uses 2; open_file_cache_errors off; if_modified_since before; ignore_invalid_headers on; client_header_timeout 1m; client_body_timeout 1m; send_timeout 1m; reset_timedout_connection on; connection_pool_size 256; client_header_buffer_size 256k; large_client_header_buffers 4 256k; client_max_body_size 4M; client_body_buffer_size 128k; request_pool_size 32k; output_buffers 4 32k; postpone_output 1460; proxy_cache_path /tmp/nginx/cache levels=1:2 keys_zone=one:30m inactive=1d max_size=500m; proxy_temp_path /tmp/nginx/proxy; proxy_cache_key "$scheme://$host$request_uri"; client_body_in_file_only on; log_format bytes_log "$msec $bytes_sent .";