REDIS持久化报错失败

最近在生成环境中发现REDIS无法持久化，报错信息如下：

redis log报错：  [7666] 15 Jan 00:22:36.028 # Error moving temp DB file on the final destination: Invalid cross-device link  [1937] 15 Jan 00:22:36.513 # Background saving error  [1937] 15 Jan 00:22:36.614 * 1 changes in 900 seconds. Saving...  [7679] 15 Jan 00:27:15.659 # 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.  [7679] 15 Jan 00:27:35.287 * DB loaded from disk: 19.629 seconds

处理方案：

根据提示，在配置文件/etc/sysctl.conf中加入：

vm.overcommit_memory=1

重启REDIS即可