nginx-502错误，老是提示busy.优化php-fpm如下

[global]
pid = /usr/local/php/var/run/php-fpm.pid
error_log = /usr/local/php/var/log/php-fpm.log
log_level = notice

[www]
listen = /tmp/php-cgi.sock
listen.backlog = -1
listen.allowed_clients = 127.0.0.1
listen.owner = www
listen.group = www
listen.mode = 0666
user = www
group = www
pm = dynamic
;pm.max_children = 60

;根据内存来设置，每个children大概30M内存，200个大概5.8G多内存
pm.max_children = 200
pm.max_requests=1024

;pm.start_servers= min_spare_servers + (max_spare_servers - min_spare_servers) / 2
pm.start_servers = 115
pm.min_spare_servers = 30
pm.max_spare_servers = 200
request_terminate_timeout = 100
request_slowlog_timeout = 5
slowlog = /usr/local/php/var/log/slow.log