WARNING overcommit_memory + Redis is loading… [45+ min]]

Resolved bibliata
(@bibliata)

2 months ago

7602:M 13 Sep 2025 03:46:18.617 # 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.
– This warning seems have started after the last plugin update

7672:M 13 Sep 2025 03:47:50.621 # Could not create server TCP listening socket ::1:6379: bind: Cannot assign requested address
– this has been there but still binding and followed by:

4551:M 13 Sep 2025 04:31:02.374 * Server initialized
4551:M 13 Sep 2025 04:31:02.374 * Loading RDB produced by version 6.0.16
4551:M 13 Sep 2025 04:31:02.374 * RDB age 4298 seconds
4551:M 13 Sep 2025 04:31:02.374 * RDB memory usage when created 25301.50 Mb

/etc$ redis-cli ping
LOADING Redis is loading the dataset in memory
and stays there for 45min with no start…

Viewing 10 replies - 1 through 10 (of 10 total)

Plugin Author Till Krüss
(@tillkruess)

2 months ago

I’d disable persistence all together in Redis: appendonly no

https://redis.io/docs/latest/operate/oss_and_stack/management/persistence/

Thread Starter bibliata
(@bibliata)

2 months ago

THANKS, did so, but still:
root:~# sed -e ‘/save/ s/^#*/#/’ -i /etc/redis/redis.conf && sudo ser vice redis-server restart
Job for redis-server.service failed because a timeout was exceeded.

root:~# systemctl status redis-server.service
● redis-server.service – Advanced key-value store
Loaded: loaded (/lib/systemd/system/redis-server.service; enabled; vendor preset: enable>
Active: activating (start) since Sat 2025-09-13 11:56:51 CEST; 1min 4s ago
Docs: http://redis.io/documentation,
man:redis-server(1)
Main PID: 4723 (redis-server)
Status: “Redis is loading…”
Tasks: 6 (limit: 57712)
Memory: 7.2G
CPU: 1min 4.559s
CGroup: /system.slice/redis-server.service
└─4723 “/usr/bin/redis-server 127.0.0.1:6379” “” “” “” “” “” “” “”

Sep 13 11:56:51 systemd[1]: Starting Advanced key-value store…

Thread Starter bibliata
(@bibliata)

2 months ago

This is not a good and permanent solution but at least starts redis (for now):
redis-server –daemonize yes

Thread Starter bibliata
(@bibliata)

2 months ago

38250349 9.86G 223 0 623 (+7) 767 LOAD
38562520 9.94G 224 0 631 (+8) 775 LOAD
38874990 10.02G 237 0 637 (+6) 793 LOAD
39185006 10.09G 236 0 642 (+5) 796 LOAD
39506536 10.17G 235 0 654 (+12) 806 LOAD
39830487 10.25G 232 0 665 (+11) 813 LOAD
Reconnecting…
1129125 336.97M 1 0 9 (+-656) 10 LOAD
1664863 472.34M 1 0 17 (+8) 17 LOAD
2286036 660.19M 2 0 23 (+6) 22 LOAD
2807568 792.65M 1 0 27 (+4) 25 LOAD

Thread Starter bibliata
(@bibliata)

2 months ago

redis-server –daemonize yes shows only some of the larger websites on the instances but many smaller ones are still at: Error establishing a Redis connection
To disable Redis, delete the object-cache.php file in the /wp-content/ directory.

What would cause such partial redis presence?

Any way to delete the redis storage file and start fresh?
Or should the whole redis be deleted and re-installed?
//THANKS

Plugin Author Till Krüss
(@tillkruess)

2 months ago

This is outside the scope of support for Redis Object Cache, you’re better to ask GPT or Stack Overflow.
Thread Starter bibliata
(@bibliata)

2 months ago
```
Thanks 
We reverted back to the previous version of the plugin and everything works fine now

Loading the Redis file and stopping at 10GB is probably a limit problem
However, all options to increase memory from the redis config file change nothing in its behavior. This is from the system log:

root:~# redis-cli --stat

38250349 9.86G 223 0 623 (+7) 767 LOAD
38562520 9.94G 224 0 631 (+8) 775 LOAD
38874990 10.02G 237 0 637 (+6) 793 LOAD
39185006 10.09G 236 0 642 (+5) 796 LOAD
39506536 10.17G 235 0 654 (+12) 806 LOAD
39830487 10.25G 232 0 665 (+11) 813 LOAD
Reconnecting…
1129125 336.97M 1 0 9 (+-656) 10 LOAD
1664863 472.34M 1 0 17 (+8) 17 LOAD
2286036 660.19M 2 0 23 (+6) 22 LOAD
2807568 792.65M 1 0 27 (+4) 25 LOAD
```
Plugin Author Till Krüss
(@tillkruess)

2 months ago

You might be chasing ghosts because the last release was a minor bug fix: https://github.com/rhubarbgroup/redis-cache/compare/2.6.4…2.6.5

Thread Starter bibliata
(@bibliata)

2 months ago

Thanks,
We would like to get this fixed so we can use the plugin again
What would cause Reconnecting… in the middle of loading the REDIS file?

Thread Starter bibliata
(@bibliata)

1 month, 3 weeks ago

Is it also possible that the update reset the default databases to 16 in redis.conf?

Viewing 10 replies - 1 through 10 (of 10 total)

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