上午测试服崩了，redis拒绝服务、报max number of clients reached 。
查看配置redis.conf , maxclients 设置10000， 监控看上午11：09，连接数达到峰值10000，服务崩溃。
然后重启redis服务、暂时正常不影响使用。
修改过redis connect（host，port，timeout） ; 过期时间timeout，为60秒，但问题似乎没起作用，redis连接数一直在增长。
问题还没解决，记录一下。
问题二：日志显示写redis失败、未知原因、记录一下
ERROR - 2016-04-24 15:57:48 --> Severity: Error --> Allowed memory size of 33554432 bytes exhausted (tried to allocate 3129586 bytes) /data/web/online/application/models/mirror/UploadLocation.php 80
ERROR - 2016-04-24 15:57:50 --> 404 Page Not Found: Api/v1
ERROR - 2016-04-24 15:57:50 --> Severity: Error --> Allowed memory size of 33554432 bytes exhausted (tried to allocate 3129586 bytes) /data/web/online/application/models/mirror/UploadLocation.php 80
ERROR - 2016-04-24 15:57:51 --> Severity: Error --> Allowed memory size of 33554432 bytes exhausted (tried to allocate 3129586 bytes) /data/web/online/application/models/mirror/UploadLocation.php 80
ERROR - 2016-04-24 15:57:52 --> Severity: Error --> Allowed memory size of 33554432 bytes exhausted (tried to allocate 3129586 bytes) /data/web/online/application/models/mirror/UploadLocation.php 80
ERROR - 2016-04-24 15:57:52 --> Severity: Error --> Allowed memory size of 33554432 bytes exhausted (tried to allocate 3129586 bytes) /data/web/online/application/models/mirror/UploadLocation.php 80