Friday, August 7, 2009

vsphere, TPS, high memory utilization on Nehalem processors

After upgrading from ESX 3.5 to vsphere all of VMs were throwing memory alerts. I found this article

Basically with MMU and large page sizes enabled, TPS doesnt work so well because of the larger page size. For now I disabled the alerts, but there is also the option of disabling large page sizes.
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