welcome to nginx Tuning of nginx and tomcat in production environment

1. nginx parameter tuning

<code>worker_processes <span>3</span>; //cpu内核数目-<span>1</span> ，使用下来效果较好
<span>#worker_processes 4;</span><span>#worker_cpu_affinity 0001 0010 0100 1000;</span><span>#error_log  logs/error.log;</span><span>#error_log  logs/error.log  notice;</span><span>#error_log  logs/error.log  info;</span><span>#pid        logs/nginx.pid;</span>events {
    use epoll;
    worker_connections  <span>8192</span>;
}


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

    keepalive_timeout           <span>60</span><span>20</span>;
    client_header_timeout       3m;
    client_body_timeout         3m;
    send_timeout                3m;

    client_header_buffer_size           16k;
    large_client_header_buffers         <span>4</span> 32k;
    server_names_hash_max_size          <span>512</span>;
    server_names_hash_bucket_size       <span>64</span>;

    sendfile        on;
    tcp_nopush      on;
    tcp_nodelay     on;

    limit_req_zone $binary_remote_addr z rate=10r/s;
    limit_req_zone $http_user_agent z rate=10r/s;

    log_format  oschina_log
        <span>'$remote_addr - $remote_user [$time_local] $request '</span><span>'"$status" $body_bytes_sent "$http_referer" '</span><span>'"$http_user_agent" "$http_x_forwarded_for"'</span>;
    access_log logs/joinku.log;

    <span>#开启zip网页压缩</span>
    gzip  on;
        gzip_min_length 1k;
        gzip_buffers <span>4</span> 8k;
        gzip_http_version <span>1.1</span>;
        gzip_types text/plain application/x-javascript text/css application/xml;
        <span>...</span>
 }</code>

1. tomcat parameter tuning
   JVM settings
   l Generally use HotSpot JVM.
   l Add -server.
   l -Xms/-Xmx: Set the Java heap initialization and maximum value. The default is 1/64 physical memory and 1/4 physical memory, which generally does not exceed 80% of the physical memory, and these two should be set to the same, which is enough Just fine, too high will lead to wasted memory and long GC recycling cycles.
   l -XX:NewSize/-XX:NewRatio: Set to 25%-33% of the total Java heap. Too high or too low will lead to invalid GC.
   l -XX:PermSize/-XX:MaxPermSize: The maximum initial value of non-heap memory is set to 128M and 256M respectively.
   l -XX:+AggressiveOpts: Use the latest optimization technology.
   l Refer to the oracle official website http://www.oracle.com/technetwork/java/javase/tech/vmoptions-jsp-140102.html. There are other parameters that can be configured according to actual conditions.

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The above introduces the tuning of nginx and tomcat in the welcome to nginx production environment, including the welcome to nginx aspects. I hope it will be helpful to friends who are interested in PHP tutorials.