Differentiate between a "direct" i. Can encrypted folders or files be prevented from reuploading? Skip to main content. Find threads, tags, and users Secondly, the Debug Diagnostics report indicates the memory leak with following call-stacks.
Thanks, Vinay. Current Visibility: Visible to all users. It includes private committed, mapped, physically mapped AWE , and even reserved address spaces. This normally includes program globals, the stacks hence locals , heaps, thread-local storage, etc. Each process's "private committed" memory is that process's contribution to the system-wide counter called "commit charge".
There are also contributions to commit charge that aren't part of any one process, such as the paged pool. The backing store for "private committed" v. The "commit limit" is the size of RAM that the OS can use this will exclude RAM used for things like video buffers plus the total of the current size s of your pagefile s.
Windows will not allow allocations of private committed address space e. If a program tries it, Windows will try to expand the page file hence increasing the commit limit. If this doesn't succeed maybe because page file expansion is disabled, maybe because there's no free disk space to do it then the attempt to allocate committed address space fails e. The "Working set" is not quite "the subset of virtual pages that are resident in physical memory", unless by "resident" you mean "the valid bit is set in the page table entry", meaning that no page fault will occur when they're referenced.
But this ignores the pages on the modified and standby page lists. Pages lost from a working set go to one of these lists; if the modified list, they are written to the page file and then moved to the standby list. From there they may be used for other things, such as to satisfy another process's need for pages, or in Vista and later for SuperFetch. But until that happens, they still contains the data from the process they came from and are still associated with that process and with that processes' virtual pages.
Much slower than referring to a page that's in the working set - but much faster than having to go to disk for it. So the most precise definition of "working set" is "the subset of virtual pages that can be referenced without incurring a page fault. Ask a question. Quick access. Search related threads. Remove From My Forums. Answered by:. Archived Forums. C Standards, Extensions, and Interop. This forum covers all standardized languages, extensions, and interop technologies supported by Visual C.
Sign in to vote. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. What is private bytes, virtual bytes, working set? Ask Question. Asked 12 years ago. Active 6 months ago. Viewed k times. I am trying to use the perfmon windows utility to debug memory leaks in a process.
This is how perfmon explains the terms: Working Set is the current size, in bytes, of the Working Set of this process. These are the questions I have: Is it the Private Bytes which I should measure to be sure if the process is having any leaks as it does not involve any shared libraries and any leaks, if happening, will come from the process itself?
Are there any other tools that give a better idea of the memory usage? Jeffmagma 1 1 gold badge 8 8 silver badges 17 17 bronze badges. Is it the private byte should I measure to be sure if the process is having any leak If private bytes of a process don't grow then you have no memory leaks.
If they grow it might be due to memory leaks and it might be due to memory fragmentation. I think it is difficult to say looking at growth of private bytes what it means exactly. Add a comment. Active Oldest Votes. So the relationships are: Private Bytes are what your app has actually allocated, but include pagefile usage; Working Set is the non-paged Private Bytes plus memory-mapped files; Virtual Bytes are the Working Set plus paged Private Bytes and standby list.
Community Bot 1 1 1 silver badge. Aaronaught Aaronaught k 24 24 gold badges silver badges bronze badges. I am afraid that you answer is not quite correct. Private Bytes refer to the amount of memory RAM that the process executable has asked for - not only physical memory. Thus you can surely inspect most of the memory leak cases by monitoring private bytes.
Try ::VisualAlloc to commit a large chunk of memory say 1. You should be able to see that your private bytes are way larger than the working set. And Private Bytes CAN be swapped out - you can see private bytes larger than the physical memory you have in the machine.
Aaronaught: Your first statement about reliable indicator and appropriate for debugging is confusing. Private bytes is a reliable indicator of a leak the application memory space. It could be a dependent DLL and indirect but it is a leak in the application memory space.
Can you explain why it cannot be used for debugging? I am not sure i understand why it cannot be used for debugging.
Can you shed some light? G33kKahuna: It's not clear to me how a memory dump would tell you what is consuming the memory in any meaningful sense - unless by "what" you mean "what modules", but then all you have is a snapshot, you still cannot see which module is actually leaking the memory over time unless you take several dumps over time and under tightly controlled conditions.
It's hard to conceive of a more inefficient and unreliable debugging strategy. Profilers are everywhere these days; use one.
Run a full! You can confirm by checking the eeheap -gc. This should show you where the volume is stuck. Typically, if no hints are available with all of the above commands, your private bytes are consumed by uncollected objects in GC.
Now move on to either gchandles or gcleaks. The pointer is still there but object is gone. This is such categorical problem for unreleased event handlers.
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