虚拟机配置是四核+10G内存+10M带宽，业务不复杂，做了一些优化后（nginx分配进程，php-fpm进程，和内核的一些优化）感觉并不理想，并发4000左右就开始慢了，再多会出现504。不知道瓶颈在哪里，该怎样优化？
怪我咯2017-04-25 09:03:27
Is this a problem with c10k... No matter how awesome the single-machine configuration is, there will still be bottlenecks. A machine with a configuration worth 1 million W is far less practical than 10 machines worth 1 W each.
漂亮男人2017-04-25 09:03:27
The memory, CPU, and disk stress test information is not posted.
nginx configuration and php-fpm configuration are not posted either.
The data on related resources is not posted, such as the load of the mysql machine.
From your tone, I feel that the resources should be fine. It may be that there are not enough php-fpm processes. It is also possible that the backend such as mysql cannot handle it.