#Eclipse memory monitor bitmap android

The profiler graph shows heap memory usage. What's with the weird profiler graph on the Bitmap creation case? It barely rises in memory usage, and yet it reached a point that it can't create any more of them, eventually (after a lot of items being inserted). How could the native memory functions return me such huge values in the case of bitmap creation, yet more reasonably ones for when I decoded bitmaps ? What do they mean? In practice the app will killed by Linux OOM killer way before that happens. If the kernel does not have enough physical memory to map a page for your process, the app will receive a signal, killing it. When you try to use a page, it is paged in. All virtual memory consists of pages (usually 4Kb each).

#Eclipse memory monitor bitmap android

I assume, that current version of Android Oreo allows memory overcommit: untouched memory isn't actually requested from hardware, so you can have as much of it as allowed by OS addressable memory limit (a bit less than 2 gigabytes on x86, several terabytes on 圆4). How could it be that I could create so many bitmaps, each of size 20,000x20,000.Any caching library, that used heap size as guideline, should continue to work either way. I guess this new behavior might affect some caching libraries, right? That's because they might depend on the heap memory size instead.ĭoes not matter - Android heap size is always smaller than total physical memory.If you get call to onTrimMemory (which is directly tied to OOM killer and native memory pressure), try to reduce your consumption. Pick some arbitrary value (say, quarter of heap size) and stick with it. What's the correct way to get the max native memory that app is allowed to use, and print it on logs, and use it as something to decide of max ?.Personally I would love to see an OS API for learning about app deaths, but I won't be holding my breath. You can read a bit about overcommit here. Game developers and other people, who actively use native memory, see that happen all the time.Įnabling kernel overcommit together with lifting heap-based restrictions on Bitmap allocation may result in the picture you see.

Looks like your app was killed by Linux OOM killer.