Hi there, probably most of you are just thinking about the holidays, right ?
Well, since I’m still working, I’m also thinking about the holidays, but also on a new post.
This time I will write about VMWARE memory compression…it’s a new feature on ESX 4.1
We can think of it as a new layer of memory management.
At memory overcommit technology hierarchy it’s now placed between balloning and swapping.
1 – Trasnparent page sharing
2 – Balloning
3 – Memory Compression
4 – Disk swapping
So what happens is when ballooning is not capable of managing the workload instead of swapping the memory to disk ESX attempts first to compress the guest’s memory.
So the pages can be compressed and stored at the main memory.
The next access to that memory would require a memory decompression.
But why is that better/faster ?
Because the compressed memory still in main memory and a compress/decompress process is a lot faster than swapping in disk.
See the performance bellow:
Also If you want to read more Memory Resource Management in ESX 4.1 , check this out.
Happy New Year !!!!
Thursday, December 30, 2010
ESX 4.1 Memory Compression
Marcadores:
memory,
VMWARE,
vSphere 4.1
Who am I

- Eduardo Meirelles da Rocha
- I’m an IT specialist with over 15 years of experience, working from IT infrastructure to management products, troubleshooting and project management skills from medium to large environments. Nowadays I'm working for VMware as a Consulting Architect, helping customers to embrace the Cloud Era and make them successfully on their journey. Despite the fact I'm a VMware employee these postings reflect my own opinion and do not represents VMware's position, strategies or opinions. Reach me at @dumeirell

Most Viewed Posts
-
vRealize Automation 7.1 brings several new features and functionalities, while the community is covering the fanciest...
-
Have you tried to set up or change a root's password for an ESXi host and got the following error message: Weak...
-
If you just install VMware Converter and start running it with it’s default configuration, I’m sure you will be successfully. But, the...
-
During the past few weeks, my NSX partner in crime, the Sr. Consultant Anderson Duboc and I have been working on a NSX Reference Poster...
-
I have to admit since I started playing with PowerCLI I’ve been enjoying it more and more. A few weeks ago I needed to delete 50 VMs from t...
-
Do you know the LUNs on your environment might have different versions ? Yeah, that’s true!! To check tha LUN version, on the configuratio...
-
Once again I was working on a vSphere Site Recovery Manager project using vSphere Replication as a replication technology and had to exp...
-
Most of my time as a Consulting Architect at VMware Professional Services I spend with clients, helping them to create innovative solut...
-
Most of vCloud Director implementations I’ve worked on where multi-cells implementations behind a load balancer to distribute the load a...
-
VMware vSAN 6.2 Stretched Cluster & 2 Node Guide covers greatly all the network topologies supported and the configuration steps invo...

No comments:
Post a Comment