I would like to check which type of RAM my computer uses before I order an upgrade. I'm fairly sure its DDR2 but I would like to double check this. Is there any way to check this in Windows XP without opening the case up and looking? EDIT * The content police seem to have gotten the wrong end of the stick, I was looking for a piece ...
What is the best way to track down a memory leak that is only found on one customer's test/release box, and no where else? ...
What is the easiest way to find out how much memory an object uses in .NET? Preferably without having to resort to a third party tool. Marshal.SizeOf or the sizeof operator look useful but only work with a restricted range of types. Some related posts: Object Memory Analysis in .NET Does an empty array in .NET use any space? ...
In C++ the storage class specifier static allocates memory from the data area. What does "data area" mean? ...
This question may sound fairly elemental, but this is a debate I had with another developer I work with. I was taking care to stack allocate things where I could, instead of heap allocating them. He was talking to me and watching over my shoulder and commented that it wasn't necessary because they are the same performance wise. I was a...
I wrote a small web app using ruby on rails, its main purpose is to upload, store, and display results from xml(files can be up to several MB) files. After running for about 2 months I noticed that the mongrel process was using about 4GB of memory. I did some research on debugging ruby memory leaks and could not find much. So I have tw...
I find that quite often Visual studio memory usage will average ~150-300 Mb of RAM. As a developer who very often needs to run with multiple instances of Visual studio open. Are there any performance tricks to optimize the ammount of memory that VS uses. I am running VS 2005 with one add-in (TFS) ...
I've always been able to allocate 1400 megabytes for Java SE running on 32-bit Windows XP (Java 1.4, 1.5 and 1.6). java -Xmx1400m ... Today I tried the same option on a new Windows XP machine using Java 1.5_16 and 1.6.0_07 and got the error: Error occurred during initialization of VM Could not reserve enough space for object heap Cou...
Is there a tool/plugin/function for Firefox that'll dump out a memory usage of Javascript objects that you create in a page/script? I know about Firebug's profiler but I'd like something more than just times. Something akin to what Yourkit has for Java profiling of memory usage. Reason is that a co-worker is using id's for "keys" in a...
Context: A while ago, I stumbled upon this 2001 DDJ article by Alexandrescu: http://www.ddj.com/cpp/184403799 It's about comparing various ways to initialized a buffer to some value. Like what "memset" does for single-byte values. He compared various implementations (memcpy, explicit "for" loop, duff's device) and did not really find ...
Memory (and resource) leaks happen. How do you make sure they don't? What tips & techniques would you suggest to help avoid creating memory leaks in first place? Once you have an application that is leaking how do you track down the source of leaks? (Oh and please avoid the "just use GC" answer. Until the iPhone supports GC this isn't...
Are the string literals we use inside functions automatic variables? Or are they allocated in heap which we have to free manually? I've a situation like the code shown below wherein I'm assigning a string literal to a private field of the class (marked as ONE in the code) and retrieving it much later in my program and using it (marked a...
I would have thought that it would be clear cut whether memory allocation is faster in managed code than in native code - but there seems to be some controversy. Perhaps memory management under a Virtual Machine be faster because of no context-swapping calls to the OS, but then I see that the VM would itself need to make periodic calls ...
For example, launch Paint.NET. Then have a look on its memory usage with Task Manager: on my computer, it uses 36Mb. Then minimize Paint.NET: now it takes only a few more than 1Mb. This happens with every .NET Application. What happens when a .NET Application is minimized? Is a GC occurring? ...
The project I'm on is using a 3rd party component to build dynamic PDFs in a VB.Net web system called ABCpdf.Net. (not a terrible tool, but not a great one either.) Every now and then, for reasons I can't fathom, the document object throws a SEHException. Digging futher, it turns out this is caused by a custom exception in the documen...
Given an aggregation of class instances which refer to each other in a complex, circular, fashion: is it possible that the garbage collector may not be able to free these objects? I vaguely recall this being an issue in the JVM in the past, but I thought this was resolved years ago. yet, some investigation in jhat has revealed a circul...
Actually, two sizes: initially committed and total reserved. Do you use static or dynamic analysis? Which tools? Which techniques? ...
With very large amounts of ram these days I was wondering, it is possible to allocate a single chunk of memory that is larger than 4GB? Or would I need to allocate a bunch of smaller chunks and handle switching between them? Why??? I'm working on processing some openstreetmap xml data and these files are huge. I'm currently streaming th...
I have been using ruby for a while now and I find for bigger projects it can take up a fare amount of memory. What are ruby best practices for reducing memory usage? Please, let each answer have on "best practice" and let the community vote it up ...
How can I monitor the memory being used by a native C DLL that is being called from Java via JNI? Using standard Java monitoring tools and options I can see the Java memory space, but I cannot view any memory used by the C DLL. Java is using ~70MB, but the task in the Task Manager shows 200Mb+, and I'd like to see what's in that 130MB...