I see the following error in redis logs:
 10 Aug 16:13:21.055 * 1 changes in 900 seconds. Saving…
 10 Aug 16:13:21.055 # Can't save in background: fork: Cannot
allocate memory 
And error message saying:
> Error running script (call to > f_1477e1798ff8d1bae3066a94781114c056f9ef08): @user_script:8: > @user_script: 8: -MISCONF Redis is configured to save RDB snapshots, > but is currently not able to persist on disk. Commands that may modify > the data set are disabled. Please check Redis logs for details about > the error.
This looks strange as dump.rdb file seems to be reasonably small ~90Mb. And also I tired to create another file in the same folder, and managed to do it (so disk space is not the issue). Permissions looks good to me:
ubuntu@ip-172-31-39-198:/var/lib/redis$ ls -hla total 89M drwxr-xr-x 2 redis redis 4.0K Aug 10 16:23 . drwxr-xr-x 47 root root 4.0K Aug 10 15:18 .. -rw-rw---- 1 redis redis 89M Aug 10 15:19 dump.rdb
After some googling I have found this as a solution:
echo 1 > /proc/sys/vm/overcommit_memory sysctl vm.overcommit_memory=1
Which makes no sense to me, as I expected the issue to be solved with redis config…
Could you advice what to do?