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Fixed: Memory alarms triggered with AMD RVI and Intel EPT?

Duncan Epping · Sep 25, 2009 ·

I wrote about two weeks ago and back in March but the issues with false memory alerts due to large pages being used have finally been solved.

Source

Fixes an issue where a guest operating system shows high memory usage on Nehalem based systems, which might trigger memory alarms in vCenter. These alarms are false positives and are triggered only when large pages are used. This fix selectively inhibits the promotion of large page regions with sampled small page files. This provides a specific estimate instead of assuming a large page is active when one small page within it is active.

BEFORE INSTALLING THIS PATCH: If you have set Mem.AllocGuestLargePage to 0 to workaround the high memory usage issue detailed in the Summaries and Symptoms section, undo the workaround by setting Mem.AllocGuestLargePage to 1.

Six patches have been released today but this fix was probably the one that people talk about the most that’s why I wanted to make everyone aware of it! Download the patches here.

Related

Server ESX, esxi, patches, performance, vSphere

Reader Interactions

Comments

  1. rickymh says

    25 September, 2009 at 23:59

    Thanks Duncan!

    Patch time!

  2. jimau says

    2 October, 2009 at 01:10

    Is there a similar fix for 3.5 or is it only available on ESX4.0?

  3. DonB says

    3 November, 2009 at 16:16

    I was wondering if a patch was available for 3.5 as well…

    Using Update Manager I am up to date as of this past Sunday on my AMD/Nehalem ESX 3.5 nodes bt all my Win2K8 x64 servers are still in alarm 🙁

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About the Author

Duncan Epping is a Chief Technologist and Distinguished Engineering Architect at Broadcom. Besides writing on Yellow-Bricks, Duncan is the co-author of the vSAN Deep Dive and the vSphere Clustering Deep Dive book series. Duncan is also the host of the Unexplored Territory Podcast.

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