lnmp，cpu占用100%

nginx 1.12.1
php 7.0.27

扩展：
memcached
Zend OPcache
redis
imagick

nginx.conf
user www www;
worker_processes 4;
worker_cpu_affinity 0001 0010 0100 1000;
error_log /www/wwwlogs/error_nginx.log crit;
pid /var/run/nginx.pid;
worker_rlimit_nofile 51200;
events {
use epoll;
worker_connections 51200;
multi_accept on;
}
http {
include mime.types;
default_type application/octet-stream;
server_names_hash_bucket_size 128;
client_header_buffer_size 128k;
large_client_header_buffers 4 128k;
client_max_body_size 32m;
client_body_buffer_size 32m;
client_body_temp_path /usr/local/nginx/client_body_temp 1 2;
sendfile on;
tcp_nopush on;
keepalive_timeout 120;
server_tokens off;
tcp_nodelay on;
fastcgi_connect_timeout 600;
fastcgi_send_timeout 600;
fastcgi_read_timeout 600;
fastcgi_buffer_size 64k;
fastcgi_buffers 16 16k;
fastcgi_busy_buffers_size 128k;
fastcgi_temp_file_write_size 128k;
fastcgi_intercept_errors on;
#Gzip Compression
gzip on;
gzip_buffers 16 8k;
gzip_comp_level 6;
gzip_http_version 1.1;
gzip_min_length 256;
gzip_proxied any;
gzip_vary on;
gzip_types
text/xml application/xml application/atom+xml application/rss+xml application/xhtml+xml image/svg+xml
text/javascript application/javascript application/x-javascript
text/x-json application/json application/x-web-app-manifest+json
text/css text/plain text/x-component
font/opentype application/x-font-ttf application/vnd.ms-fontobject
image/x-icon;
gzip_disable "MSIE [1-6]\.(?!.*SV1)";
#If you have a lot of static files to serve through Nginx then caching of the files' metadata (not the actual files' contents) can save some latency.
open_file_cache max=65535 inactive=30s;
open_file_cache_valid 30s;
open_file_cache_min_uses 1;
open_file_cache_errors on;
######################## default ############################
server {
listen 80;
server_name _;
access_log /www/wwwlogs/access_nginx.log combined;
root /www/wwwroot/default;
index index.html index.htm index.php;
#error_page 404 /404.html;
#error_page 502 /502.html;
location /nginx_status {
stub_status on;
access_log off;
allow 127.0.0.1;
deny all;
}
location ~ [^/]\.php(/|$) {
#fastcgi_pass remote_php_ip:9000;
fastcgi_pass unix:/dev/shm/php-cgi.sock;
fastcgi_index index.php;
include fastcgi.conf;
}
location ~ .*\.(gif|jpg|jpeg|png|bmp|swf|flv|mp4|ico)$ {
expires 30d;
access_log off;
}
location ~ .*\.(js|css)?$ {
expires 7d;
access_log off;
}
location ~ /\.ht {
deny all;
}
}
########################## vhost #############################
include vhost/*.conf;
}