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• Could it be more efficient for systems in general to do away with Stacks and just use Heap for memory management?

  - by Dark Templar

  It seems to me that everything that can be done with a stack can be done with the heap, but not everything that can be done with the heap can be done with the stack. Is that correct? Then for simplicity's sake, and even if we do lose a little amount of performance with certain workloads, couldn't it be better to just go with one standard (ie, the…

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• Tuning OS X Virtual Memory

  - by dcolish

  I've noticed some really odd results form vm_stat on OSX 10.6. According to this, its barely hitting the cache. Searches of pretty much everywhere I could think of turn up little to explain why the rate is so low. I asked a few friends and they're seeing the same thing. What gives and how can I make it better? Mach Virtual Memory Statistics:…

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• How do you implement Software Transactional Memory?

  - by Joseph Garvin

  In terms of actual low level atomic instructions and memory fences (I assume they're used), how do you implement STM? The part that's mysterious to me is that given some arbitrary chunk of code, you need a way to go back afterward and determine if the values used in each step were valid. How do you do that, and how do you do it efficiently?…

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• Need help with memory leaks in RSS Reader

  - by Stilton

  I'm trying to write a simple RSS reader for the iPhone, and it appeared to be working fine, until I started working with Instruments, and discovered my App is leaking massive amounts of memory. I'm using the NSXMLParser class to parse an RSS feed. My memory leaks appear to be originating from the overridden delegate methods: -…

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• Need help with a possible memory management problem(leak) regarding NSMutableArray

  - by user309030

  Hi, I'm a beginner level programmer trying to make a game app for the iphone and I've encountered a possible issue with the memory management (exc_bad_access) of my program so far. I've searched and read dozens of articles regarding memory management (including apple's docs) but I still can't figure out what exactly is wrong…

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• Need help with a memory management problem in my game model

  - by user309030

  Hi, I'm a beginner level programmer trying to make a game app for the iphone and I've encountered a possible issue with the memory management (exc_bad_access) of my program so far. I've searched and read dozens of articles regarding memory management (including apple's docs) but I still can't figure out what exactly is wrong…

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• Do classes which have a vector has a member have memory issues

  - by user263766

  I am just starting out C++, so sorry if this is a dumb question. I have a class Braid whose members are vectors. I have not written an assignment operator. When I do a lot of assignments to an object of the type Braid, I run into memory issues :- 0 0xb7daff89 in _int_malloc () from /lib/libc.so.6 #1 0xb7db2583 in malloc…

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• allocating extra memory for a container class.

  - by sil3nt

  Hey there, I'm writing a template container class and for the past few hours have been trying to allocate new memory for extra data that comes into the container (...hit a brick wall..:| ) template <typename T> void Container<T>::insert(T item, int index){ if ( index < 0){ cout<<"Invalid…

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• SQL Server 2008 (64-bit)

  - by Grace09

  I have transaction log backup failures randomly. SQL Server Log says 'Memory constraints resulted reduced backup/restore buffer sizes. Proceding with 6 buffers of size 64KB.', and the SQL Server Agent Error Log has quite a few errors like 'Unable to start Job Manager thread for job xxx', '[298] SQLServer Error: 768,…

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• NSMutableString leaks on append or replaceOccurrencesOfString

  - by John

  Hello Folks, I know similar questions have been asked time and time again but I ask that you please bear with me as I cannot seem to find an answer that helps. My application has leaks that are driving me out of my mind. Actually, they are not reported as leaks using Leaks, but my net bytes in ObjectAlloc goes up…

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• MKMapView Memory Leak in iPhone Application

  - by user255884

  I am working on an iPhone application which uses MKMapView and shows userlocation. I am getting memory leaks where leaked object is NSCFArray of size 128 Bytes, GeneralBlock-16, GenralBlock-8 when is set MKMapView's showUserLocation property as TRUE. If is set it as NO then i dont get this leak. Can anyone suggest…

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• UIImagePicker and Memory Warning Level 1

  - by user262829

  Hello, Whenever I use a UIImagePicker to take a picker in my app, I get the following message in the debug console: Receive memory warning. Level=1 I am using the following code: imagePickerController = [[UIImagePickerController alloc] init]; imagePickerController.delegate = self; …

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• Better Flex memory profiling tools

  - by verveguy

  Does anyone know of any better tools that the Flex Builder Profiler? I've googled and googled to no avail. While the FB tools are OK for small apps / small leak situations, they're nowhere near adequate for wading through the thicket of object references that can arise in a large scale…

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• memory not freed in matlab?

  - by noam

  I am running a script that animates a plot (simulation of a water flow). After a while, I kill the loop by doing ctrl-c. After doing this several times I get the error: ??? Error: Out of memory. And after I start receiving that error, every call to my script will generate it. Now,…

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• iphone how to remove modal uiviewcontroller from memory

  - by Scott Pendleton

  I have a root UIViewController which has a property called webView. WebView is a UIViewController with a XIB that contains a UIWebView. From my root view I modally (is there any other way?) load the webView ViewController and set its URL, always to the same page. I discovered that…

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• Memory leak issue with UIImagePickerController

  - by Mustafa

  I'm getting memory leak with UIImagePickerController class. Here's how I'm using it: UIImagePickerController *picker = [[UIImagePickerController alloc] init]; picker.delegate = self; picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary; [self…

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• What is your development checklist for Java low-latency application?

  - by user49767

  I would like to create comprehensive checklist for Java low latency application. Can you add your checklist here? Here is my list 1. Make your objects immutable 2. Try to reduce synchronized method 3. Locking order should be well documented, and handled…

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• Android setImageURI out of memory error

  - by Improver

  I have a very small activity that must show an image. If picture is not very small (for example 1.12 Mb 2560x1920) it produces out of memory on change screen orientation. I tried getDrawable.setCallback(null) but no luck. Where am I wrong? public…

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• Memory leak using NSMutableArray in RootViewController called from App Delegate

  - by Lauren Quantrell

  I've written code to restore the state of my app, but there's a memory leak in the NSMutableArray. I'm new to Xcode so I apologize if this is something trivial I have overlooked. Any help is appreciated. lq AppDelegate.m -…

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• free() on stack memory

  - by vidicon

  I'm supporting some c code on Solaris, and I've seen something weird at least I think it is: char new_login[64]; ... strcpy(new_login, (char *)login); ... free(new_login); My understanding is that since the variable is a…

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• How can I keep the cpu temp low?

  - by Newton

  I have an HP pavilion dv7, I'm using ubuntu 12.04 so the overheating problem with sandybridge cpu is a lot better. However my laptop is still becoming too hot to keep on my legs. The problem is that the fan wait too much…

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• Listing all shared memory segments used by a process on AIX5.3+

  - by Frank Meerkötter

  I would like to find all shared memory segments used by a given process. I am especially interested in figuring out the shmid so i can use it in calls to shmctl(). On Solaris i would just read /proc/$PID/map to figure…

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• SQL Server 2005 Error 701 - out of memory

  - by Tufo

  I'm currently having following error message when executing a .sql file with about 26MB on SQL Server 2005: Msg 701, Level 17, State 123 There is insufficient system memory to run this query. I'm working with 4GB…

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• Understanding memory and cpu speed

  - by tipu

  Firstly, I am working on a windows xp 64 machine with 4gb ram and 2.29 ghz x4 I am indexing 220,000 lines of text that are more or less the same length. These are divided into 15 equally sized files. File 1/15…

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• UIImage from NSDocumentDirectory leaking memory

  - by Emil

  Hey. I currently have this code: UIImage *image = [[UIImage alloc] initWithContentsOfFile:[imagesPath stringByAppendingPathComponent:[NSString stringWithFormat:@"/%@.png", [postsArrayID…

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