一个更永久的修复方法可能是查看/etc/redis/redis.conf中200-250行左右的rdb特性的设置，这不是redis 2中的一部分。x天。

值得注意的是

dir ./

可更改为

dir /home/someuser/redislogfiledirectory

或者您可以注释掉所有保存行，而不用担心持久性。(见/etc/redis/redis.conf中的注释)

还有，别忘了

service redis-server stop
service redis-server start

此错误是由于BGSAVE失败导致的。在BGSAVE期间，Redis会fork一个子进程来将数据保存到磁盘上。虽然BGSAVE失败的确切原因可以从日志中检查(通常在linux机器上的/var/log/redis/redis-server.log)，但很多时候bgive失败是因为fork不能分配内存。很多时候，由于操作系统的优化冲突，fork无法分配内存(尽管机器有足够的可用RAM)。

可以从Redis常见问题中阅读:

Redis background saving schema relies on the copy-on-write semantic of fork in modern operating systems: Redis forks (creates a child process) that is an exact copy of the parent. The child process dumps the DB on disk and finally exits. In theory the child should use as much memory as the parent being a copy, but actually thanks to the copy-on-write semantic implemented by most modern operating systems the parent and child process will share the common memory pages. A page will be duplicated only when it changes in the child or in the parent. Since in theory all the pages may change while the child process is saving, Linux can't tell in advance how much memory the child will take, so if the overcommit_memory setting is set to zero fork will fail unless there is as much free RAM as required to really duplicate all the parent memory pages, with the result that if you have a Redis dataset of 3 GB and just 2 GB of free memory it will fail. Setting overcommit_memory to 1 says Linux to relax and perform the fork in a more optimistic allocation fashion, and this is indeed what you want for Redis.

Redis不需要像操作系统认为的那样多的内存来写入磁盘，所以可能会预先导致fork失败。

要解决这个问题，您可以:

修改/etc/sysctl.conf，增加:

vm.overcommit_memory=1

然后重新启动sysctl:

在FreeBSD上:

sudo /etc/rc.d/sysctl reload

在Linux上:

sudo sysctl -p /etc/sysctl.conf

如果你在windows机器上本地运行Redis，试着“以管理员身份运行”，看看它是否有效。对我来说，问题是Redis位于“程序文件”文件夹中，默认情况下会限制权限。这是应该的。

但是，不要以管理员身份自动运行Redis。你不会想要授予它更多的权限。你想按规矩办事。

因此，我们能够通过作为管理员运行它来快速识别问题，但这不是解决方法。一种可能的情况是，你把Redis放在一个没有写权限的文件夹中，结果DB文件被存储在同一个位置。

您可以通过打开redis.windows.conf并搜索以下配置来解决此问题:

    # The working directory.
    #
    # The DB will be written inside this directory, with the filename specified
    # above using the 'dbfilename' configuration directive.
    #
    # The Append Only File will also be created inside this directory.
    #
    # Note that you must specify a directory here, not a file name.
    dir ./

将dir ./更改为具有常规读写权限的路径

你也可以将Redis文件夹整体移动到一个你知道拥有正确权限的文件夹。

由于内存不足，bgsave过程中可能会出现错误。试试这个(从redis后台保存FAQ)

echo 'vm.overcommit_memory = 1' >> /etc/sysctl.conf
sysctl vm.overcommit_memory=1

如果你正在使用docker/docker-compose，并且想要阻止redis写入文件，你可以创建一个redis配置并挂载到容器中

docker.compose.override.yml

  redis:¬
      volumes:¬
        - ./redis.conf:/usr/local/etc/redis/redis.conf¬
      ports:¬
        - 6379:6379¬

您可以从这里下载默认配置

在redis.conf文件中，确保注释掉这3行

save 900 1
save 300 10
save 60 10000

您可以在这里查看更多删除持久数据的解决方案

# on redis 6.0.4 
# if show error 'MISCONF Redis is configured to save RDB snapshots'
# Because redis doesn't have permissions to create dump.rdb file
sudo redis/bin/redis-server 
sudo redis/bin/redis-cli