Cocoa memory editing inspection
How would I go about editing the memory of other applications using Cocoa? I know the editing has to be done as root, but how would I do it in the first place? ...
memory
What is "tagged memory"?
What is "tagged memory" and how does it help in reducing program size? ...
Coping with, and minimizing, memory usage in Common Lisp (SBCL)
I have a VPS with not very much memory (256Mb) which I am trying to use for Common Lisp development with SBCL+Hunchentoot to write some simple web-apps. A large amount of memory appears to be getting used without doing anything particularly complex, and after a while of serving pages it runs out of memory and either goes crazy using all...
How to serialize big objects in .NET? (OutOfMemory Exceptions)
I'm using serialization for "save" feature in my application. But when the data is too big (15+ MB) I'm starting to get OutOfMemory exceptions. I've got so many objects and they are connected with other little objects, I think this is causing too much processing power and data held in the memory. My code is based on this, almost same: ...
Can someone explain my Windows/SQL Server memory usage
I'm running Windows Server 2003 x64 with 8GB RAM and SQL Server 2005 64 bit. I have SQL set to use loads of memory, but the SQL process only ever takes under 100 MB RAM. Is this normal? It is accessing data with indexes many GBs in size. Moreover, no process is taking over 100MB, yet there is only a minimal (<100MB) amount ofree memory....
How to help java tomcat processes to regain used memory?
We are running an web application that is using Java 64bit 5 gigs of -Xmx of maximum heap size. We have no control over the java code. We can only tweak configuration parameters. The situation that we are facing is that the java processes after it takes the full heap allocated at start up, it starts acting very responding very slow to...
Improving filesystem access on a remote fileserver
I have a large file server machine which contains several terabytes of image data that I generally access in chunks. I'm wondering if there is anything special that I can do to hint to the OS that a specific set of documents should be preloaded into memory to improve the access time for that subset of files when they are loaded over a f...
Maximum .NET achievable memory?
Which is the maximum amount of memory one can achieve in .NET managed code? Does it depend on the actual architecture (32/64 bits)? ...
NSArray with Custom Objects in NSTableDataSource
I am trying to make NSTableDataSource compatible object and give this object to NSTableView as DataSource, however when table tries to display data, it crashes. @interface NSArrayDataSource : NSObject{ NSArray* internalArray; } -(id) initWithArray: (NSArray*) objects; -(int)numberOfRowsInTableView:(NSTableView *)aTableView; -(id)ta...
.NET JIT'ed assemblies in sharable pages
When running a .NET 2.0 WinForms app in a Terminal Services environment, I'm seeing some unexpected results that I can't quite explain. Everything I have read has indicated that JIT'ed assemblies (i.e., not using NGen to create native images) result in all code space being stored in private pages, increasing working set size / memory pr...
How can i estimate memory usage of stl::map?
For example, I have a std::map with known sizeof(A) and sizefo(B), while map has N entries inside. How would you estimate its memory usage? I'd say it's something like (sizeof(A) + sizeof(B)) * N * factor But what is the factor? Different formula maybe? Update: Maybe it's easier to ask for upper bound? ...
Nehalem Xeon performance on 32-bit OS, XP vs 2003
I have to run 32-bit code on WinXP or Win2003. Nehalem Xeons (5500 series) should be the fastest, but I'm not sure what'll happen with the memory arrangement. I'm unsure about 2 parts: To get a maximal speed memory setup, I'll need to install at least 6gb of RAM (to give each CPU 3 sticks to work with). Is the memory interleaved in suc...
Adding many frameworks to a Java application - will it have any negative side effects?
If one adds many framework dependencies to a Java application, will this increase its memory footprint drastically, because it preloads all libraries at startup or is that a more lazy behaviour which would load only the needed classes when you actually need it (e.g. import statements or even later)? Could adding many dependencies also h...
OutOfMemoryException in Regex Matches when processing large files
I've got an exception log from one of production code releases. System.OutOfMemoryException: Exception of type 'System.OutOfMemoryException' was thrown. at System.Text.RegularExpressions.Match..ctor(Regex regex, Int32 capcount, String text, Int32 begpos, Int32 len, Int32 startpos) at System.Text.RegularExpressions.RegexRunner.Init...
What is the memory overhead of an object in Java?
Duplicate: What is the memory consumption of an object in Java? Assuming Java 1.6 JVM on 64-bit Linux on an Intel or AMD box, creating a simple object uses how much memory overhead in bytes? For example, each row in a 2-dimensional array is a separate object. If my array is large, how much RAM will I be using? ...
Memory mapped files in .NET app
I am using a Memory mapped file to cache a large amount of data for an ASP.NET application. At the moment I am using the global.asax event to open the file and get a memory mapped file handle which I cache in the application object. If I dereference that handle to a pointer and try to cache the pointer in my httphandler, I get a protec...
Instruments Leaks - Not showing my source code
I am attempting to analyze an iPhone application using the Leaks application and everything appears to be working fine, except for when I try to view detailed information about a particular memory leak. Leaks does not appear to be loading my source code. Looking at the stack view on the right, I can see calls that reference iPhone frame...
tiny memory manager
I have a chunk of memory, let us say 'NN'MB. I want a custom memory manager that will only allocate from this memory. The memory manager should be capable of allocating, freeing using the chunk already available. It will be great if it can also handle fragmentation. Edited: I looking for some open source in C, or is there some API like...
C array is displaying garbage data (memory problems?)
I'm making a driver for an 8x8 LED matrix that I'm driving from a computer's parallel port. It's meant to be a clock, inspired by a design I saw on Tokyoflash. Part of the driver is an array of 3*5 number "sprites" that are drawn to the matrix. A coordinate of the matrix is assigned to a coordinate of the sprite and so forth, until the...
What is the memory overhead of a Java method?
What is the memory overhead of a function in a class? For example, Class A { int a } Class B { int a int foo(int); } So 100 instances of class A should be 80 bytes. What about 100 instances of class B? ...