CODEWITHSUNDEEP
androidmemory
user941884
user941884

Reputation: 21

How to analyze memory usage of an app

I try to debug an Android application which has an out of memory error. The app cannot allocate 3Mbytes in some condition. I analyze the adb log, there are some debug output of dalvikvm as below:

dalvikvm: GC_FOR_MALLOC freed <1K, 47% free 4781K/8967K, external 55469K/57517K, paused 64ms
dalvikvm: GC_EXTERNAL_ALLOC freed <1K, 47% free 4781K/8967K, external 55469K/57517K, paused 80ms
dalvikvm: GC_FOR_MALLOC freed 0K, 47% free 4781K/8967K, external 55469K/57517K, paused 39ms

I compare the number in above output with the number in "Heap" window of DDMS. "free 4781K/8967K" seems corresponding to "Allocated" and "Heap size" in "Heap" of DDMS. However, I'm not sure what is "external 55469K/57517K". I suspect that it is memory allocated by native code. Does anybody know this?

Upvotes: 0

Views: 1605

Answers (1)

nmr
nmr

Reputation: 16839

It's complicated, so says this Android platform engineer:

How do I discover memory usage of my application in Android?

3mb is a lot for an Android app, the starting heaps are pretty small, ~16-32mb.

Upvotes: 1

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