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We did install Redis server 3.0.7 which has made our Magento store 1.9.x a bit better than before, but I just need to ask that all settings which comes out of the box in Redis is fine? or do I need to tune into something as we have much RAM available on machine and I want to cache as much as possible I can.

Also, when I check Redis utilization by running

redis-cli info | grep used_memory_human

it just returns some MB's like 3.72M or less than that(while when using file system caching in Magento it grows to much more) why is that?, can I somewhere define that as much memory Redis can use out of as much Gigs of RAM or is it kind of autoscale which goes up and down according to need?

  • you can set max ram redis can use, otherwise it will go infinite, but all objects have ttl, and will be deleted -> redis.io/topics/config scroll down – MagenX Mar 12 '16 at 11:46
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    @MagenX Ok, so it is smart enough with default settings to upscale as it needs to be. But, why redis-cli info | grep used_memory_human returns with some Mbytes like 3.7M while when saving on disk it uses much space than this. Could it be something like it flushes every second after query finishes? – T_Flows Mar 12 '16 at 21:09

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