asked on
Memory Management
Hi
I wants to know when & how the esx host manage teh meory
Esx host have 98 GB RAM and hosted 10 VM ( each VM have 24GB RAM)
I can see the Host Mem utilisation is 92GB. (Shared by all VM and directly consuming from Physical RAM)
At VM level, there is no value for Ballooning & swaping.
1 I wants to know why the Ballooning and swapping is not happening ?
2 If VM are occupied more than 90 % in Physical memory, whether i can build anotehr VM with Large memory in the same host ?
3 At above said condition(92 Gb utilised), if all VM are requesting for their granted memory, then how the esx host will manage ( This situation, ESX already triggered Critical Mem usage Alarm)
I wants to know when & how the esx host manage teh meory
Esx host have 98 GB RAM and hosted 10 VM ( each VM have 24GB RAM)
I can see the Host Mem utilisation is 92GB. (Shared by all VM and directly consuming from Physical RAM)
At VM level, there is no value for Ballooning & swaping.
1 I wants to know why the Ballooning and swapping is not happening ?
2 If VM are occupied more than 90 % in Physical memory, whether i can build anotehr VM with Large memory in the same host ?
3 At above said condition(92 Gb utilised), if all VM are requesting for their granted memory, then how the esx host will manage ( This situation, ESX already triggered Critical Mem usage Alarm)
VMware
Last Comment
Andrew Hancock (VMware vExpert PRO / EE Fellow/British Beekeeper)
esx 4 does memory slices better than 3 so what version esx
ASKER
Thanks for the reply,
All VM have VMtoolinstalled, and our version is ESXi 4.1
One Doubt:please correct me if i am wrong.
When enough resource is available in Physical RAM, then ballooning & swapp is not rquiired,
I will clear my question
eg:
ESX : 8 GB RAM ,
VM1 : 6GB (Current Host Mem usage is 5GB)
VM2 : 6GB (Current Host Mem usage is 2GB)
Here ESX have enough resource to allocate the memory from RAM. But it generating alrm 90%.
Next time, VM2 required another 2GB, then how the ESX will manage the overcommitt? what is the esx host warning level ?
All VM have VMtoolinstalled, and our version is ESXi 4.1
One Doubt:please correct me if i am wrong.
When enough resource is available in Physical RAM, then ballooning & swapp is not rquiired,
I will clear my question
eg:
ESX : 8 GB RAM ,
VM1 : 6GB (Current Host Mem usage is 5GB)
VM2 : 6GB (Current Host Mem usage is 2GB)
Here ESX have enough resource to allocate the memory from RAM. But it generating alrm 90%.
Next time, VM2 required another 2GB, then how the ESX will manage the overcommitt? what is the esx host warning level ?
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If all machines request their memory, the ESX host will start to swap to disk, causing performance issues.
Have a read of this Yellow Brick article
Which metric to use for monitoring memory?
http://www.yellow-bricks.com/2011/04/29/which-metric-to-use-for-monitoring-memory/
http://justincockrell.com/?p=125