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Why is virtual memory so high?
Virtual memory is simulated RAM. When all of the RAM in a machine being is used, the computer shifts data to an empty space on the hard drive. The computer swaps data to the hard disk and back to the RAM as needed. When virtual memory is increased, the empty space reserved for RAM overflow increases.
What is Virt memory in Htop?
VIRT stands for the virtual size of a process, which is the sum of memory it is actually using, memory it has mapped into itself (for instance the video card’s RAM for the X server), files on disk that have been mapped into it (most notably shared libraries), and memory shared with other processes.
What happens if I set my virtual memory too high?
The bigger the virtual memory space, the bigger the adress table becomes in which is written, which virtual adress belongs to which physical adress. A big table can theoreticaly result in slower translation of the adresses and therefore in slower reading and writing speeds.
Why is Linux using more Virt memory than storage?
A little read to better understand each column because it’s not just disk or memory but also shared libraries :
What does Virt stand for in computer terms?
VIRT stands for the virtual size of a process, which is the sum of memory it is actually using, memory it has mapped into itself (for instance the video card’s RAM for the X server), files on disk that have been mapped into it (most notably shared libraries), and memory shared with other processes.
How to interpret the memory usage information from hTop?
The memory meter in htop says a low number, such as 9%, when top shows something like 90%! (Or: the MEM% number is low, but the bar looks almost full. What’s going on?) The number showed by the memory meter is the total memory used by processes.
What does virtual memory size in top mean?
Address space (ie. virtual memory in the process list) doesn’t cost anything; it’s not real. What’s real is the RSS (RES) column, which is resident memory. That’s how much of your actual memory a process is occupying. But even that isn’t the whole answer.