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I have a one-year-old iMac with 8GB RAM running a bootcamped Windows 7 Ultimate 64 bit.
The following memory analysis with Sysinternals RamMap.exe leaves some questions open:
What could be the reason for the nearly 5 GB of memory in the Nonpaged Pool? How can I find out which driver is causing this huge memory usage?
cheesus says stop firing mods
Posted 2012-12-15T13:40:18.373
Reputation: 1 106
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Found it, you can add the column "NP Pool" to the "Processes" tab on Task Manager:
In my case, the culprit was Fling File Transfer, which has a serious memory leak. It was using more than 2 GB of the nonpaged memory pool before I restarted it. The above screenshot shows it after running for two minutes.
Bug report filed.
cheesus says stop firing mods
Posted 2012-12-15T13:40:18.373
Reputation: 1 106
1I have Nonpaged Pool of 4GB in RamMap and the largest NP Pool in Task Manger is 1MB. What now? – bradvido – 2014-10-01T14:05:58.293
You have to show all users' tasks in Task Manager. See http://cdn-static.zdnet.com/i/story/60/34/000437/007_task_manager_elevated_small.jpg
– cheesus says stop firing mods – 2014-10-01T14:07:39.807Thanks so much for sharing that! Everything else I'd found online involved way too many steps. I much prefer your solution, which immediately revealed the guilty process. – Joe M – 2013-09-03T13:29:18.793
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I'm glad that you found a solution, but note that, "the Non-paged pool area seen under RAMMAP is not the same as the non-paged pool usage observed from task manager." From: http://support.microsoft.com/kb/2762246
– None – 2013-12-06T18:41:35.437Okay, maybe the numbers don't correspond one-to-one, but it surely helped my find the process which was responsible for the high NP memory usage. – cheesus says stop firing mods – 2013-12-08T10:07:45.377
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!poolused 2andpoolused 3with WinDBG can reveal this; although you seem to have found a native approach in the Task Manager, good job! – Tamara Wijsman – 2012-12-15T13:55:16.863