Running out of commit limit while you still have lots of available RAM is not at all unusual. Neither the commit limit nor the commit charge are directly related to free or available RAM. Since you have no page file, the commit limit is smaller than it would be if you had a page file. It doesn't matter how much of the RAM is free. For the commit limit, only the amount of RAM installed matters.
Commit charge is a count of virtual memory, not physical. Suppose my program asks for 2 GB committed, but then it only accesses. The remaining 1. I know about virtual memory of course : And about "pages, tables, page file" and so on too. But there are nothing about commit memory.
But it's not clear too. It is now backed by a physical memory page. This will usually be a physical RAM page, but could eventually be a page in the page file on the hard disk, or it could be a page in a memory mapped file on the hard disk. The memory manager handles the translations from the virtual memory page to the physical page.
A virtual page could be in located in physical RAM, while the page next to it could be on the hard drive in the page file. It is now backed by a physical memory page" Not quite: a page becomes a "committed page" when an application commits virtual memory. Now I have completely got confused : What is commit memory? Just virtual memory? These two terms are equivalent? But by screenshot from my server it not so.
Or what? I think "no" anyway - If you sum all virtual memory of all applications and OS like "paged kernel memory" it will not equivalent "commit charge". In task manager and process explorer it's two different terms. More logical definition gives in the WiKi: "commit charge is a term used in Microsoft Windows operating systems to describe the total amount of virtual address space for which the backing store is the pagefile" Ah!
May be commit memory is just piece of virtual memory for which the backing store is the pagefile? We can try to consider it from other point of view. I am right? This term suggests that "total commit memory" or total commit charge is the sum of used memory - as "real memory" and "virtual memory in a page file"? But it besides will not be coordinated to my screenshot : What ideas? I will be glad to any explanations.
Friday, January 28, AM. Committed — there are two parts, Commit Charge and Commit Limit. This is a fixed number based on your physical memory as well as the custom defined page size. This changes as you open and close apps, and the higher the number reaches closer to the max Commit Limit, the more memory in use should be and more page files will be used. Why memory is compressed when there are available spaces? Please enter your comment! Please enter your name here.
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