instruments

I'm attempting to download a large number of images using AFNetworking 2.5 and stream them to disk. According to the memory monitor in Xcode, this is causing unbounded memory growth (and eventually memory warnings and force quits) - but profiling the memory usage using the allocations instrument shows the memory usage to be stable. I'd like to think Xcode is just wrong here, but then why would my app be getting killed by iOS? Instruments shows this - the peaks are Core Data queries, then the rest is the images downloading - peaks at about 9.5MB, the rest sits at about 8.5MB I've also tried

is there any good tutorial/link on how to use instruments while debugging, especially for memory leaks? Thanks Elfred Try this link: Cocoa Tutorial: Fixing Memory Leaks With Instruments 来源： https://stackoverflow.com/questions/1554526/how-to-use-instruments-while-testing

I'm working on an iOS app that will create a lot of small objects and floats, and trying to get an idea for how much memory usage it's consuming. When I run the "Allocations" instrument, it says I have about 2MB of "Live Bytes", and the figure stays roughly constant as I move through the app (spikes up to 3MB or so when the App is busy, but then drops back down to 2MB). But when I run the "Activity Monitory" instrument, my app's "Real Memory" is 25MB once it finishes launching, and grows rapidly whenever drawing occurs inside my CALayer. In less than a minute, it goes over 100MB. Why would

I am getting some memory warning in my iOS app so I am running Instruments to see the allocations. Should I look at the * All Allocations * Live Bytes or Overall Bytes? Someone said the iOS can close my app if I use for 22MB, is that from the Live or Overall bytes section? zaph Live Bytes is the current usage and is what you are interested in, overall bytes includes all released allocation. The other thing is to look at the graph and look for peaks. As an example I saw a huge peak of about 27MB in an app I was working on, knowing that I was able to reduce peak memory usage to 8MB. Also watch

I dropped out of the CS program at my university... So, can someone who has a full understanding of Computer Science please tell me: what is the meaning of Dirty and Resident, as relates to Virtual Memory? And, for bonus points, what the heck is Virtual Memory anyway? I am using the Allocations/VM Tracker tool in Instruments to analyze an iOS app. * Hint - try to explain as if you were talking to an 8-year old kid or a complete imbecile. Thanks guys. "Dirty memory" is memory which has been changed somehow - that's memory which the garbage collector has to look at, and then decide what to do