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Differences Between CPU Overcommitment and Memory Overcommitment

Created: Jun 30, 2022 01:47:17Latest reply: Jun 30, 2022 05:17:35 184 4 0 0 0
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Hello everyone!


This post enquires about the differences between CPU overcommitment and memory overcommitment. Please see more details below.


ISSUE DESCRIPTION


What are the differences between CPU overcommitment and memory overcommitment?

 

I would like to thank you in advance for sharing your feedback, as it is very important to me.

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Featured Answers
olive.zhao
Admin Created Jun 30, 2022 01:52:22

Hello, friend!

CPU overcommitment enables one physical CPU to display multiple vCPUs in virtualization mode, improving the CPU usage of the physical core. The overcommitment ratio refers to the CPU overcommitment ratio.

Memory overcommitment means that when the physical memory of the server is fixed, the memory overcommitment technology (memory bubble, memory sharing, and memory swap) is used to multiplex the memory in time.

Memory overcommitment enables the total memory size of VMs to be greater than the total memory size of servers, improving VM density on servers.

Therefore, memory overcommitment is a resource allocation solution that improves VM density on a single host, reduces costs, and sacrifices performance for density.

Hope this helps!

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Unicef
Unicef Created Jun 30, 2022 02:36:09 (0) (0)
Well done  
ashad
ashad Created 7 days ago (0) (0)
Basically allocate CPU and memory to beyond what's available on the server.
But since all wont be used at the same time (depending on the load) or some might even be switched off, the we can config more VM's on a server and increase density.

Its like how airlines overbook flights.  
All Answers
olive.zhao
olive.zhao Admin Created Jun 30, 2022 01:52:22

Hello, friend!

CPU overcommitment enables one physical CPU to display multiple vCPUs in virtualization mode, improving the CPU usage of the physical core. The overcommitment ratio refers to the CPU overcommitment ratio.

Memory overcommitment means that when the physical memory of the server is fixed, the memory overcommitment technology (memory bubble, memory sharing, and memory swap) is used to multiplex the memory in time.

Memory overcommitment enables the total memory size of VMs to be greater than the total memory size of servers, improving VM density on servers.

Therefore, memory overcommitment is a resource allocation solution that improves VM density on a single host, reduces costs, and sacrifices performance for density.

Hope this helps!

View more
  • x
  • convention:

Unicef
Unicef Created Jun 30, 2022 02:36:09 (0) (0)
Well done  
ashad
ashad Created 7 days ago (0) (0)
Basically allocate CPU and memory to beyond what's available on the server.
But since all wont be used at the same time (depending on the load) or some might even be switched off, the we can config more VM's on a server and increase density.

Its like how airlines overbook flights.  
Chanbora
Chanbora Created Jun 30, 2022 05:17:35

Good
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