网站挂了，nginx+php-fpm 重启php-fpm暂时解决

用户、流量啥的都不大，

fpm进程参数如下：

pm.max_children = 100

pm.start_servers =80

pm.min_spare_servers = 20

日志如下，从启用开始就报的错

[31-Jul-2014 18:49:14] NOTICE: [pool www] child 26462 started

[31-Jul-2014 18:49:15] NOTICE: [pool www] child 24743 exited with code 0 after 891.856027 seconds from start

[31-Jul-2014 18:49:15] NOTICE: [pool www] child 26502 started

[31-Jul-2014 18:49:15] NOTICE: [pool www] child 24758 exited with code 0 after 891.158274 seconds from start

[31-Jul-2014 18:49:15] NOTICE: [pool www] child 26503 started

[31-Jul-2014 18:49:15] NOTICE: [pool www] child 24739 exited with code 0 after 891.976156 seconds from start

[31-Jul-2014 18:49:15] NOTICE: [pool www] child 26505 started

[31-Jul-2014 18:49:15] NOTICE: [pool www] child 24761 exited with code 0 after 890.977127 seconds from start

[31-Jul-2014 18:49:15] NOTICE: [pool www] child 26506 started

[31-Jul-2014 18:49:15] NOTICE: [pool www] child 24770 exited with code 0 after 891.006928 seconds from start

[31-Jul-2014 18:49:15] NOTICE: [pool www] child 26508 started

[31-Jul-2014 18:49:15] NOTICE: [pool www] child 24753 exited with code 0 after 891.929728 seconds from start

[31-Jul-2014 18:49:15] NOTICE: [pool www] child 26509 started

[31-Jul-2014 18:49:16] NOTICE: [pool www] child 24773 exited with code 0 after 891.386904 seconds from start

[31-Jul-2014 18:49:16] NOTICE: [pool www] child 26518 started

[31-Jul-2014 18:49:16] NOTICE: [pool www] child 24775 exited with code 0 after 891.396730 seconds from start

[31-Jul-2014 18:49:16] NOTICE: [pool www] child 26519 started

[31-Jul-2014 18:49:16] NOTICE: [pool www] child 24766 exited with code 0 after 891.421983 seconds from start

[31-Jul-2014 18:49:16] NOTICE: [pool www] child 26520 started

[31-Jul-2014 18:49:16] NOTICE: [pool www] child 24768 exited with code 0 after 891.440330 seconds from start

[31-Jul-2014 18:49:16] NOTICE: [pool www] child 26521 started

[31-Jul-2014 18:49:16] NOTICE: [pool www] child 24776 exited with code 0 after 891.438618 seconds from start

[31-Jul-2014 18:49:16] NOTICE: [pool www] child 26523 started

[31-Jul-2014 18:49:16] NOTICE: [pool www] child 24772 exited with code 0 after 891.440693 seconds from start

[31-Jul-2014 18:49:16] NOTICE: [pool www] child 26524 started

[31-Jul-2014 18:49:16] NOTICE: [pool www] child 24792 exited with code 0 after 891.287219 seconds from start

求解决方案