redis保存数据出错处理方法：在/etc/sysctl.conf配置文件中，添加：“vm.overcommit_memory = 1”，保存配置，重启redis即可。
redis保存数据出错的解决方法：
问题：Redis “MISCONF Redis is configured to save RDB snapshots, but is currently not able to persist on disk”
查看日志出现提示信息如：
“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 this to take effect.”
解决方法：
在/etc/sysctl.conf配置文件中，添加：“vm.overcommit_memory = 1”，保存配置，重启redis即可。
