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I'm getting Out of Memory errors in one of my programs (I'm a programmer). This is ridiculous, because I have 16GB RAM on a Windows 7 x64 system, and no reason why I should be running out. So I investigated, and looked between Resource Monitor and Task Manager to find what's using all my memory:

enter image description here

Notice: 15,158 KB memory in use. But at a glance, the amount of memory actually being used by programs does not add up. I plugged in actual figures from Task Manager (note, "Show Processes from All Users" is checked!) and got to about 10.7 GB before getting into all the teensy little <50MB programs. So where's the remaining 4+ GB of memory gone to?

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closed as too localized by Ƭᴇcʜιᴇ007, Brad Patton, Shaul Behr, 8088, Breakthrough Apr 23 '13 at 17:01

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You can use RAMMap to investigate the use of physical memory. However, out of memory messages usually refer to virtual memory. A 32bit process would normally be restricted to 2GB virtual memory. I assume you have a page file. – David Marshall Apr 23 '13 at 9:58
I wonder if your program is only allocated x amount of resources. I've had the same issue creating a log file, Visaul Studio tells me out of memory and I've used 4 or 5 GB of my 16GB! It may have something to do with the program you're writing being 32bit instead of 64bit – Dave Apr 23 '13 at 10:04
Chrome by itself is using almost 2.5GB of your memory. So you are actually using around 15GB. – Ramhound Apr 23 '13 at 10:55
You can copy data from Task Manager, and paste in Excel. Then you can use formula and check that memory is not elsewhere. – Xaruth Apr 23 '13 at 11:45
up vote 5 down vote accepted

I can't follow your conclusion. On the screenshot there are 25 processes that add up to about 11GB but there are about 150 processes which you didn't add as you stated because they are to small. If you take those ~150 processes and assume an average of 25MB per process you will get ~4GB which corresponds the amount of Memory you claim to be missing! I would recommend you have a closer look at the teensy little <50MB programs and recalculate.

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Except that that's a faulty assumption. There are not 150 other processes, and the average is way less than 25 MB. Somewhere there are some undocumented processes. I just rebooted and recalculated again with fewer processes in memory, and I still come to the inescapable conclusion that there is something other than the processes displayed consuming around 3GB of RAM – Shaul Behr Apr 23 '13 at 11:03
@Shaul as long as you don't give us all the information we have to assume something... sometimes it is faulty, but according to the scroll bar in the Task Manager I guessed that there are about 6-7 times more processes running... – valerie Apr 23 '13 at 11:11
Well, well, I just discovered that you can copy and paste rows from Resource Monitor into Excel... and it turns out that the calculation is correct, after all. I'm so embarrassed... :-/ – Shaul Behr Apr 23 '13 at 11:17

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