What Is Hard Faults/sec?

A hard fault is a type of computer memory fault that occurs when the operating system tries to read data from a page in physical memory but is unable to do so. The page is usually swapped out to the hard disk, and this process is known as paging. The operating system then retrieves the page from the disk and loads it back into memory, causing a process delay.

The number of hard faults experienced by a system per second is an important system performance metric. It is a measure of the number of times the computer has to access the disk to obtain data that is not currently in memory. The lower the number of hard faults per second, the more efficient the system is, as data is being accessed from memory instead of the slower storage device. Understanding this performance metric is essential for maintaining the health and proper functioning of computer systems.

What is Hard Faults/sec?

Hard faults/sec is a performance metric used to measure the number of times per second the operating system is forced to swap data from physical memory (RAM) to the hard disk drive due to insufficient space in the RAM.

Some key points to note about hard faults/sec include:

– When a program needs more memory than the system has available, the operating system will create a hard fault by moving some of the data from RAM to the hard disk drive. This process is known as paging or swapping.
– Hard faults/sec is a metric used to track the frequency of these hard faults. Higher hard faults/sec indicates that the system is frequently swapping data between RAM and the hard disk, which can significantly slow down performance.
– Hard faults/sec can be monitored and analyzed using performance monitoring tools built into the Windows operating system, such as Perfmon or Resource Monitor. These tools can help identify programs or processes that are consuming too much memory and causing excessive paging.
– Reducing hard faults/sec can be achieved by adding more RAM to the system, closing unnecessary programs or processes, or improving overall system performance through hardware upgrades (e.g. replacing a mechanical hard drive with an SSD) or operating system tuning.
– Hard faults/sec is just one of many metrics used to measure system performance and should be considered in conjunction with other metrics, such as CPU usage, disk I/O, and network traffic to get a complete picture of system health.


1. What is Hard Faults/Sec?
Hard Faults/Sec is a performance metric that measures the number of times that the computer’s memory system has to retrieve data from the slower hard disk instead of the faster RAM.

2. What causes Hard Faults/Sec?
Hard Faults/Sec can be caused by various factors such as a shortage of physical RAM, high usage of virtual memory, paging file fragmentation, and insufficient memory allocation by the operating system.

3. What is the impact of high Hard Faults/Sec on system performance?
High Hard Faults/Sec can significantly impact system performance, leading to slow application response times, freezing, and crashing. It indicates that the computer is using the hard disk as virtual memory, which causes delays in data retrieval.

4. How can I reduce Hard Faults/Sec on my computer?
You can reduce Hard Faults/Sec on your computer by increasing the physical RAM, optimizing the paging file size and location, defragmenting the hard disk, disabling unnecessary services and startup programs, and updating the drivers and firmware.

5. How can I monitor Hard Faults/Sec on my system?
You can monitor Hard Faults/Sec on your system using the Windows Performance Monitor or Resource Monitor. These tools provide real-time data on various performance metrics, including Hard Faults/Sec, and can help you identify performance issues and their causes.


In summary, hard faults/sec refer to the number of times a program requires data that is not stored in its physical memory space. This can lead to slower system performance and even program crashes if not managed properly. By understanding this concept, system administrators and users can take preventative measures to improve their computer’s speed and stability. Regular maintenance, such as updating software and hardware, can help alleviate the occurrence of hard faults/sec and ensure a smoother operating system.

Leave a Reply