服务器：centos7，openresty，php7

配置按照的教程： https://segmentfault.com/a/1190000011299586

在执行命令：

/usr/local/openresty/nginx/sbin/nginx -t

出现了错误：

nginx: [emerg] the size 10485760 of shared memory zone "limit" conflicts with already declared size 52428800 in /usr/local/openresty/nginx/conf/nginx.conf:38 nginx: configuration file /usr/local/openresty/nginx/conf/nginx.conf test failed

请问如何 fix 这个错误？为什么会出现这个错误？在哪里修改？具体需要修改成什么样子（请直接贴答案）？请教小伙伴们，谢谢。

我执行的命令：

vim /usr/local/openresty/nginx/conf/nginx.conf

/usr/local/openresty/nginx/sbin/nginx -t

贴出目前自己的 nginx.conf：

user www; worker_processes 1;

#error_log logs/error.log; #error_log logs/error.log notice; #error_log logs/error.log info;

#pid logs/nginx.pid;

events { worker_connections 1024; }

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

#log_format main '$remote_addr - $remote_user [$time_local] "$request" '

'$status $body_bytes_sent "$http_referer" '

'"$http_user_agent" "$http_x_forwarded_for"';

#access_log logs/access.log main;

sendfile on;

#tcp_nopush on;

#WAF

lua_shared_dict limit 50m; #防 cc 使用字典，大小 50M

lua_shared_dict guard_dict 100m;

lua_shared_dict dict_captcha 70m;

lua_max_running_timers 1;

lua_package_path "/usr/local/openresty/nginx/conf/waf/?.lua";

init_by_lua_file "/usr/local/openresty/nginx/conf/waf/init.lua";

access_by_lua_file "/usr/local/openresty/nginx/conf/waf/access.lua";

lua_shared_dict limit 10m;

#keepalive_timeout 0;

keepalive_timeout 65;

#gzip on;

server {

listen 80;

server_name  localhost;

#charset koi8-r;

#access_log  logs/host.access.log  main;

location / {
    root   html;
    index  index.html index.htm index.php;
}

#error_page  404              /404.html;

# redirect server error pages to the static page /50x.html

error_page   500 502 503 504  /50x.html;

location = /50x.html {
    root   html;
}

# proxy the PHP scripts to Apache listening on 127.0.0.1:80

location ~ \.php$ {
    proxy_pass   http://127.0.0.1;
}

# pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000

location ~ \.php$ {
   root           html;
    fastcgi_pass   127.0.0.1:9000;
    fastcgi_index  index.php;
    fastcgi_param  SCRIPT_FILENAME  /document_root$fastcgi_script_name;
   include        fastcgi_params;
}

# deny access to .htaccess files, if Apache's document root
# concurs with nginx's one
#
#location ~ /\.ht {
#    deny  all;
#}

}

# another virtual host using mix of IP-, name-, and port-based configuration

#server {

listen 8000;

listen somename:8080;

server_name somename alias another.alias;

location / {

root html;

index index.html index.htm;

}

#}

HTTPS server

#server {

listen 443 ssl;

server_name localhost;

ssl_certificate cert.pem;

ssl_certificate_key cert.key;