See very low memory sharing with ESXi

We have recently migrated our environment of ESX4 on the G5 to ESXi4.1 on HPDL380G7 HPDL385 and I see what I consider very low memory sharing levels, and I wanted a second opinion on this.

Today, I put two of our hosts in maintenance mode to strengthen the cluster a little just to make sure it wasn't because of the very spread machines crash on in all directions.

A rapid formation of installation - the cluster has two pools of resources, Production and DevTest.  Both are expandable and unlimited, DevTest for low values, and Production other than high values.

When I look at the summary of the list of resources, I see pretty much what I expect with DevTest, 11GO shared, but the production, which contains 5 times more machines, share only about 1 GB.

When I run ESXTop on the host, even when running in memory of 88%, with many of the same type of operating system on the machine, I see only 1 GB of PSHARE on counters.  That seems very low, and I need some direction that where to start the search.

I have attached a few files of what I see as well.

ESXiTopMemShare is a the memory page on ESXTop showing the low value of Pshare.

Dev_test_mem shows the preview of the list of resources to development/test.

Production_memory shows the preview of the list of production resources

Guest_OS displays the type and the number of operating systems running on the host that the screenshot of memory ESXiTop is extracted - showing in fact there are many similar systems running on the host computer.

Your new CPU will use large pages, who do not - when you hit the claim of memory, these pages will be converted to smaller ones that will begin to share.

http://www.yellow-bricks.com/2011/01/26/re-large-pages-gabvirtualworld-frankdenneman-forbesguthrie/

Tags: VMware

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