nginx配置问题

nginx: the configuration file /www/server/nginx/conf/nginx.conf syntax is ok
nginx: [alert] mmap(MAP_ANON|MAP_SHARED, 524288000) failed (12: Cannot allocate memory)
nginx: configuration file /www/server/nginx/conf/nginx.conf test failed




添加了一个反向代理后就出现了这个。

这配置的什么啊？