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POApp crashes with very low memory usage iphone/iPad
 

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    <p>I have read lot of posts regarding Low memory warning crash, But I was unable to solve the problem of crash in my app. The Allocation of instruments shows Live bytes ranging from 2-7MB. It never spikes beyond 7 or 7.5MB but still app crashes. </p> <p>I read some links which tells that Allocations and Activity monitor shows different values of memory usage. As specified earlier, Allocations will show max of 7-7.5MB but Activity monitor shows about 75MB usage when app is launched and as I use the program, it starts increasing and decreasing. It will go up to 110-120MB and then reduce to 75-80MB.</p> <p>Some more links says to look at Dirty size and resident size in VM Tracker. When I check in VM Tracker, the Dirty size will start from 30MB and starts to increase as I use the app. It goes beyond 400MB. I am using about 150 images in which about 70-80 are of 1024x1024 size, about 35 are in 110x110 and rest are of 3000x4000 sized image. All of these images were originally in png format and I have programatically converted to JPG+ALPHA and added as asset to a application. Whenever corresponding image has to be loaded, I divide the JPG+ALPHA image into 16 parts and finally join them to get original image. I am doing this because when I tried to load image of resolution 3000x4000, memory was spiking till 40-45MB in Allocations, so used this method. This method makes sure that the memory will never be exceeded more than 10MB.</p> <p>All of these records and statistics are measured using Simulator. </p> <p>Application never crashes on Simulator but it crashes on real device. I am using iPad2 for testing. </p> <p>Please help me to solve this problem. I am stuck from past 2 days and completely frustrated by seeing app crash. </p>
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    1. COSearch for `heapshots`, it's a functionality of the Allocations tool. You can track what memory got alloc'd and dealloc'd at specific time intervals. Also, fyi, some image handling methods use cacheing, like `imageNamed`. You could also try with `NSAutoreleasePool`, because there are so many images in memory at the same time.
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    2. COwhat does the crash log say...?
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    3. COThanks for the reply @Templar. I have used NSAutoreleasePool everywhere and I am using initWithContentsOfTheFile to load the contents of image. Will try with heapshots and post the result here.
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