redkstats is a result of mixing parts of words "redis keys stats". This utility is intended for gathering keys and their idleTime to build basic statistics for further analysis.
Imagine that you have plenty of unnecessary data. And keys are not set to be "expirable" or those data should be expired at some point in the distant future. But the problem is - you don't really know what are the keys or even their prefixes (namespaces).
So this is the moment where this utility comes in action. Using redkstats you could collect all the keys and their idle time (see redis command OBJECT IDLETIME), group them by their prefix and get some
basic stats. Summary that you got might help you to decide which keys should be deleted from the storage.
Be careful with keys that store integer values. Currently, Redis only supports string objects with integer values. This is actually a balance between memory and CPU (time): although sharing objects will reduce memory consumption. As far as the current implementation is concerned, when the redis server is initialized, 10000 string objects will be created with integer values of 0-9999. If you set neither maxmemory nor maxmemory-policy(*-LRU), redis will encode all the objects which have the save integer value to a shared one. That means, these keys share the same value object. To identify this, you can test with none integer values.
This project is licensed under the GNU GPLv3 - see the LICENSE file for details