iOS Memory Profiling issue Navigator vs Instruments please help

Hi!

I'm very confused right now. Please help!

Xcode Debug navigator shows constant memory grows from 120Mb to infinity (I had a patience to achieve 200) But! Profiling allocations with Instruments shows nothing of that sort, Persistent Heap allocations are within 70 Mb range, and graph never growth, just wiggles around.

What is the difference? What should I rely on?