Why Does My 64-bit App Still Get OutOfMemory Exceptions Despite Ample RAM?

.NET Out Of Memory Exception: A Guide to Resolving Memory Threshold Issues with 64-bit Systems

Certain applications may encounter an Out Of Memory exception when the memory usage exceeds a specific threshold, despite having ample RAM installed. In this article, we'll delve into this issue and provide a solution for a scenario where a 64-bit machine with 16GB of memory continues to trigger this exception after 1.3GB of memory utilization.

The assumption that the issue might stem from a single object exceeding 2GB is incorrect, as the problem persists even when all objects remain below this size. This suggests the existence of an underlying Windows mechanism that terminates applications reaching a certain memory threshold.

The key to resolving this issue lies in understanding the concept of compiling for different target architectures. While you have a 64-bit machine, the application may still be compiled for a 32-bit target architecture. To fully utilize the memory capabilities of your system, it's essential to compile the code targeting 64-bit architecture.

By doing so, your application will be able to allocate memory beyond 2GB in the CLR (Common Language Runtime), where collections like List could previously cause the OutOfMemoryException on both 32-bit and 64-bit architectures.

Compiling for 64-bit architecture allows your application to benefit from the increased memory capacity of your system. It's important to note that this will result in a binary executable that can only run on 64-bit systems. However, by addressing the memory threshold issue, you'll be able to unlock the full memory potential of your 64-bit machine and avoid the Out Of Memory exception.

The above is the detailed content of Why Does My 64-bit App Still Get OutOfMemory Exceptions Despite Ample RAM?. For more information, please follow other related articles on the PHP Chinese website!