windows下php+nginx并发报500错误

RT
目前 ，当并发达到20 之后， 打开php 页面将会变得很慢，再多了 ，就彻底 报 500 了。这个时候，系统的cpu 跟 内存 并且都不高
下面是nginx 的配置文件：

PHP code

worker_processes  1;

error_log  logs/error.log crit;

pid        ../data/nginx.pid;

events {
    worker_connections  1024;
}

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

    access_log off;
    # log_format processtime '"$request" $status $request_time ';
    # access_log  logs/access.log processtime;

    sendfile        on;
    #tcp_nopush     on;

    #keepalive_timeout  0;
    keepalive_timeout  120;

    #gzip  on;

    server {
        include port.conf;
        client_max_body_size    20m;

        rewrite ^/netcenter/(.+)$ /$1;
        rewrite ^/(.+)\.(asmx|aspx)$ /$1.php;

        location / {
            include root.conf;
        }

        location = / {
            include root.conf;
            fastcgi_pass   127.0.0.1:9000;
            fastcgi_index  index.php;
            fastcgi_param  SCRIPT_FILENAME index.php;
            include        fastcgi_params;
        }

        location ~* \.(php|asmx|aspx)$ {
            include root.conf;
            fastcgi_pass   127.0.0.1:9000;
            fastcgi_param  SCRIPT_FILENAME $fastcgi_script_name;

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