out of memory(Out of Memory)


Out of Memory


Out of Memory (OOM) is a common computer error that occurs when a program tries to allocate more memory space than is available. This error can cause system instability, slow performance, and can even lead to the termination of the program or system crash. In this article, we will explore the reasons behind the OOM error, its impact on computer systems, and possible solutions to mitigate its effects.

Causes of Out of Memory:

There are several reasons that can trigger an Out of Memory error. One of the primary causes is a lack of physical memory, commonly known as RAM (Random Access Memory). When a program requires more memory space than what is available in the RAM, the operating system tries to compensate for it by utilizing virtual memory, which is a portion of the hard drive acting as an extension of the RAM. However, the performance of virtual memory is significantly slower compared to physical memory, leading to slower execution of the program.

Effects of Out of Memory:

The consequences of an Out of Memory error can vary depending on the severity of the issue and the criticality of the program or system affected. In some cases, the program may crash or terminate abruptly, resulting in the loss of unsaved data. The system may become unstable, leading to frequent freezes or unresponsiveness. System performance may also degrade significantly as the computer spends a significant amount of time swapping data between the RAM and virtual memory. This can impact the overall productivity and user experience.

How to Mitigate Out of Memory Errors:

Preventing Out of Memory errors requires understanding the underlying causes and implementing appropriate measures. Here are a few strategies that can be adopted to mitigate the impact of these errors:

1. Optimize Memory Usage

Ensure that the program or application is using the allocated memory efficiently. Identify memory leaks, which occur when memory is allocated but not properly deallocated after its use, and fix them. Use efficient data structures and algorithms that require less memory space. Regularly monitor and analyze memory usage to identify any patterns or areas that can be optimized.

2. Increase Physical Memory

If the Out of Memory error occurs frequently, considering upgrading the computer's physical memory can be a viable option. Installing additional RAM can provide more memory space for programs, reducing the reliance on virtual memory and consequently improving the overall system performance.

3. Adjust Virtual Memory Settings

Virtual memory settings can be adjusted to allocate more space for virtual memory, although this may have limited effectiveness compared to physical memory. By increasing the virtual memory, the computer can handle larger memory requirements and reduce the chances of encountering an Out of Memory error.

4. Limit Concurrent Execution

If possible, restrict the number of programs or processes running concurrently. Each program consumes a certain amount of memory, so reducing the number of programs running simultaneously can decrease the chances of encountering memory constraints.

5. Consider 64-bit Architecture

Switching to a 64-bit operating system can significantly increase the memory address space, allowing larger applications to run more efficiently. This can be especially beneficial for memory-intensive tasks or applications that frequently encounter Out of Memory errors on 32-bit systems.


Out of Memory errors can significantly impact computer systems, leading to program crashes, system instability, and reduced performance. By understanding the causes behind these errors and implementing appropriate mitigation strategies, users can minimize the occurrence of such errors and improve the overall system reliability and performance.