Mac mini Server (Late 2012) memory issue

kernel_task consumes a lot of RAM. Take a look at the screenshot and everything will be clear without word.
Already read many times here in discussions and many users complain about the exact same problem, but Apple is silent and is permissible to recognize the problem, but the problem really is!
It's about a memory leak in the kernel and in the "kernel_task" process. At first, I had 4 gigabytes of memory, and then I upgrade to 16 gigabytes but the problem remained.
Question to the representatives of Apple:
When you release an update that resolves a memory leak?!!!!

"in/out pages state" indicates that there is a lack of RAM, the system starts using the swap file which slows down computer perfomance.
I had same thing while I had 4 gigabytes. After installing the 16 gigabytes is no longer used swap file, but kernel_task consumes almost 2 gigabytes this is abnormal. When further computer is running longer then more RAM consumed by kernel_task, its indicate of memory leaks in kernel_task and this is a real problem which Apple does not want to admit it.

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