Redis Boot Warning Resolved

[root@centos224]# service REDISD start 21985:m, 04:07:20.376 * Increased maximum number of open files to 10032 (it W
                As originally set to 1024).                                             
      _._                                                  
           _.-``__ ''-._  _.-``    `.  `_.  "-._ Redis 3.2.1 (00000000/0)".-".-".
 ' \ \ _.,_ '-._ (',.-' | ',) Running in standalone mode |`-._`-...-` __...-.``-._|'     ` _.-'|    port:6379 |     `-._   `._    /     _.-'    |                                  
 pid:21985 '-._ '-._ '-./_.-' _.-' | '-._ '-._ '-.__.-' _.-' _.-' |    |           `-._`-._        _.-'_.-'    | Http://redis.io '-._ '-._ '-.__.-' _.-' _.-' | '-._ '-._ '-.__.-' _.                                  
 -'_.-'|    |              `-._`-._        _.-'_.-'    |                    
  `-._    `-._`-.__.-'_.-'    _.-'                                   
      `-._    `-.__.-'    _.-'                                           
              `-._        _.-' '-.__.-' 21985:m 04:07:20.428 # warning:the TCP Backlog setting O
F 511 cannot be enforced because/proc/sys/net/core/somaxconn are set to the lower value of 128. 21985:m 04:07:20.428 # Server started, Redis version 3.2.1 21985:m for 04:07:20.428 # WARNING Overcommit_memory is set to 0! 
	Background save may fail under low memory condition.
	To fix this issue add ' vm.overcommit_memory = 1 ' to/etc/sysctl.
conf and then reboot or run the command ' Sysctl Vm.overcommit_memory=1 ' for the "take effect. 
	21985:m 04:07:20.428 # WARNING You has Transparent Huge Pages (THP) support for enabled in your kernel. 
	This would create latency and memory usage issues with Redis. To fix thisIssue run the command ' echo never >/sys/kernel/mm/transparent_hugepage/enabled ' as root, and add it to YOUR/ETC/RC. Local in order to retain the setting after a reboot.
Redis must be restarted after THP is disabled. 21985:m 04:07:20.442 * DB loaded from disk:0.014 seconds 21985:m in Nov 04:07:20.443 * The server is now ready to
 Accept connections on port 6379

Warning:

Increased maximum number of open files to 10032 (it is originally set to 1024).

Solution:

#查看系统限制
[root@centos224]# ulimit-a

#设置 "open files" number
[root@centos224]# ulimit-n 10032

#或者设置用户限制
[root@centos224]# vi/etc/security/limits.conf

Warning:

Warning:the TCP Backlog setting of 511 cannot be enforced because/proc/sys/net/core/somaxconn are set to the lower value of 128.

Solution:

[root@centos224]# Echo 511 >/proc/sys/net/core/somaxconn
[root@centos224]# echo "net.core.somaxconn = 551" > /etc/sysctl.conf

Warning:

WARNING Overcommit_memory is set to 0! Background save may fail under low memory condition. 
	To fix this issue add ' vm.overcommit_memory = 1 ' to/etc/sysctl.
	conf and then reboot or run the command ' Sysctl Vm.overcommit_memory=1 ' for the "take effect.

Solve:

[root@centos224]# echo 1 >/proc/sys/vm/overcommit_memory
[root@centos224]# echo ' Vm.overcommit_memory=1 ' > >/etc/sysctl.conf

Warning:

WARNING You has Transparent Huge Pages (THP) support for enabled in your kernel. 
	This would create latency and memory usage issues with Redis. 
	To fix this issue run the command ' echo never >/sys/kernel/mm/transparent_hugepage/enabled ' as root, and 
	add it to Your/etc/rc.local in order to retain the setting after a reboot. Redis must be restarted after THP is disabled.

Solve:

[root@centos224]# echo never >/sys/kernel/mm/transparent_hugepage/enabled
[root@centos224]# vi/etc/rc.local
if Test-f/sys/kernel/mm/transparent_hugepage/enabled; then
   echo never >/sys/kernel/mm/transparent_ hugepage/enabled
fi
if test-f/sys/kernel/mm/transparent_hugepage/defrag; then
   echo never >/sys/ Kernel/mm/transparent_hugepage/defrag
fi