I Recompilation nginx
./configure --user=user --group=user --prefix=/usr/local/nginx --with-http_stub_status_module --with-http_ssl_module --with-http_sub_module --with-http_gzip_static_module
and remove
proxy_temp_path /dev/shm/proxy_temp;
fastcgi_temp_path /dev/shm/fastcgi_temp;
client_body_temp_path /dev/shm/client_body_temp;

Questions remain，why?