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Phantom Memory Usage

Posted on 2014-09-10
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Last Modified: 2016-06-14
I am having an issue where the memory usage on a server slowly increases until it reaches almost almost 100%. Virtual memory also fills to capacity then the server locks up and has to be hard booted.

The total memory usage in the Perfomance graph in task manager will show the total usage but the processes tab does not show what is consuming all of the memory. The memory usage of all of the processes at this moment totals roughly 5GB while the Performance graph shows 12GB/16GB consumed.

I have to reboot every few days in order to clear the memory.

I am not running sql or any virtualization.

I have tried restarting may services that i thought could be the cause  with no luck.

The Server is 2012R2 and acts as a domain controller, file server and print server. It DFSs all file shares to an almost identially configured server in another location. That server has no such issue.
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Question by:bts86
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by:Thomas Grassi
ID: 40315003
Sounds like a memory leak to me.

Do you have Server Manager running on the server all the time?

check this http://support.microsoft.com/kb/2793908
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by:bts86
ID: 40315164
That sounds like my issue but i tried to install and could not because that it is for 2012 not 2012 R2.

I looked through the available updates on my server and did not find anything similar.

I will fully patch overnight tonight to be sure.
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by:bts86
ID: 40317758
I rebooted, patched, then rebooted again last night.

So far so good today, memory consumption has been holding steady.

It does though take 3-5 days before it becomes an issue normally.
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by:bts86
ID: 40320120
I can see that the memory is filling up again.

Is there any way to find out which process has the leak?
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by:Thomas Grassi
ID: 40320265
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bts86 earned 0 total points
ID: 40328019
I have had those patches installed already. I think I did find the leak though.

I have 2 backup programs. One is a baremetal image that runs  overnight, and the other is a continuous backup for versioning that runs during business hours.

I found that the leak stopped when I disabled the continuous backup. After a little tweaking, I now have both running again without any leak. I had to disable a feature that enables backing up open files.

Its been a few days now and memory usage has remained at a reasonable level.
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