ESXi System Resource Reservations
As my first step away from ESX toward the new and exciting world of ESXi I apparenlty missed somethign somewhere.
It was my undestanding that in ESXi there was no reason for Resource reservations. Furethermore when I look a the default configuration I see 0MB reserved.
However, I have a 3 host cluster with with 50 VM's. When I tried to remediate my servers with the 2 patches released on 4/28, I received the following error:
Migration to host <<unknown>> failed with error Out of memory (195887124).
vMotion migration [220855820:130434493442365
Can someone please point me in the right direction here. My initial reaction was that I needed to increase the ESX memory reservation, but I wanted to bounce the idea off of some experts....
And FYI, when I run all of my VM's on 2 hosts they both sit at 60% memory Usage.
It was my undestanding that in ESXi there was no reason for Resource reservations. Furethermore when I look a the default configuration I see 0MB reserved.
However, I have a 3 host cluster with with 50 VM's. When I tried to remediate my servers with the 2 patches released on 4/28, I received the following error:
Migration to host <<unknown>> failed with error Out of memory (195887124).
vMotion migration [220855820:130434493442365
Can someone please point me in the right direction here. My initial reaction was that I needed to increase the ESX memory reservation, but I wanted to bounce the idea off of some experts....
And FYI, when I run all of my VM's on 2 hosts they both sit at 60% memory Usage.
ASKER
Yes, it works. Additionally I tried to remediate all 3 servers at once (Something that I don't usually do but this isn't in production yet. The first server vmotioned all the VM's, installed the patches, exited Maintenace mode all perfectly.
Then when the second server vmotioned the VM's it died after successfully vmotioning about 60% of the VM's. I manually put it in MM and it did so fine.
Then when the second server vmotioned the VM's it died after successfully vmotioning about 60% of the VM's. I manually put it in MM and it did so fine.
ASKER CERTIFIED SOLUTION
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SOLUTION
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Seldom is it necessary to change the host's memory reservation from their default settings.