RAM use 88%. It is normal?

Raspberry Pi 3 use 88% of RAM. It is normal? I use only 5 temperature sensor. Attaching photo

Hi @s.sigitas, it’s a memory leak or bug in our logging code that’s causing excessive RAM use. It’s not what we’re expecting, though you will see that a number of other people on this forum have reported the same issue so you’re not the only one. We’re working hard to get it fixed soon.

Can I ask what model(s) of temperature sensors you have hooked up?

I use all DS18B20.