Redis DB keep growing endlessly.

[dave2309]

I install redis-object-cache without an issue.
Nevertheless, after letting the server running a few days I was wondering why the DB add more than a million keys.
I figure out looking at some details on a few keys like

127.0.0.1:6379> ttl wp:posts:133558
(integer) -1

or

127.0.0.1:6379> ttl wp:author_relationships:37604
(integer) -1

that most of the keys don't have an expire time.

I understand that the plugin refers itself as "persistent", but can we set TTL for very usual keys?
Does that make sense?
Or do you guys just flush cache now and then?

David

[tillkruss]

You can see if WP_REDIS_MAXTTL‎ will do the trick for you, but millions of keys is fine, as long as you set a eviction_policy in your redis.conf.

[dave2309]

I tried to use WP_REDIS_MAXTTL‎ , but that does not change the TTL on the mentioned keys (type).
I change settings of the redis server according to what you mentioned.

• maxmemory 4gb
• maxmemory-policy allkeys-lfu

thanks for the advice