Memory filled far too fast

Hi, I installed and activated Redis Object Cache today, but after about only 30-40 minutes my site went down because of “OOM command not allowed when used memory > ‘maxmemory'”.

I’ve been reading through some support topics about setting a MaxTTL in wp-config.php (don’t know exactly the correct way to do that), however I’m not sure what would that setting be considering how fast my Redis memory was filled.

Maybe I should ask my hosting company to increase Redis’ size or something? Can anyone shed some light?

Thanks a lot in advance.