Solved

ESXi 6 and VM with 2TB of Memory

Posted on 2016-08-11
3
87 Views
Last Modified: 2016-08-13
Earlier today I fat figer a setting on a VM and instead of giving it 2GB I gave it 2GB. Now mind you the host only has 196GB of ram. I was a bit surprise the configuration even complete without error. I figure out the error after I powered up the VM and saw the error.

How could Vmware let this config succeed even though the host only had 196GB of ram. Yes I know you can over commit a host thanks to different memory saving techniques but this seem excessive. How was I even able to power up the VM? Maybe the host force other Vm to balloon?
0
Comment
Question by:compdigit44
3 Comments
 
LVL 10

Expert Comment

by:Richardson Porto
ID: 41753238
After exhaust all the physical memory (and use TPS, memory compression and balloon), VMware will use virtual swap through the file .vswp located by default on the same folder of your virtual machine, but of course with will be slower than real memory.
0
 
LVL 120

Accepted Solution

by:
Andrew Hancock (VMware vExpert / EE MVE^2) earned 500 total points
ID: 41753249
It's called Over Commit!

VM and Host have swap files, and you and you can use Flash/SSD rather than slow spinning rust.

Never used Swap to Cache ? SSD ? or PCI-E flash cards ?

http://www.yellow-bricks.com/2011/08/18/swap-to-host-cache-aka-swap-to-ssd/

I'm surprised you've never done it as a test to see what happens, and set to 4TB! and what the host go slow, and stop responding...and swap like made, and hit the disk I/O, and CPU goes 100%

It's not really VMware fault...

Give a child a Loaded Gun, and he'll shot himself by accident!
0
 
LVL 20

Author Comment

by:compdigit44
ID: 41754478
Thanks everyone...

After I powered up the VM the page file within the guest quickly expand filling up the drive. Granted this was on a test host that host our Dev VM but they connected to run and the host did not throw any alerts about high memory usage...
0

Featured Post

Microsoft Certification Exam 74-409

Veeam® is happy to provide the Microsoft community with a study guide prepared by MVP and MCT, Orin Thomas. This guide will take you through each of the exam objectives, helping you to prepare for and pass the examination.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
esx iscsi connectin creation against multiple hosts 6 58
VMware-ClientIntegrationPlugins 6 82
Find ESXI host from within guest 16 82
VM replication scenario and caveats ? 6 51
When converting a physical machine to a virtual machine using VMware vCenter Converter Standalone or vCenter Converter Enterprise, if an adapter type is not selected during the initial customization the resulting virtual machine may contain an IDE d…
HOW TO: Connect to the VMware vSphere Hypervisor 6.5 (ESXi 6.5) using the vSphere (HTML5 Web) Host Client 6.5, and perform a simple configuration task of adding a new VMFS 6 datastore.
Teach the user how to install ESXi 5.5 and configure the management network System Requirements: ESXi Installation:  Management Network Configuration: Management Network Testing:
Teach the user how to install log collectors and how to configure ESXi 5.5 for remote logging Open console session and mount vCenter Server installer: Install vSphere Core Dump Collector: Install vSphere Syslog Collector: Open vSphere Client: Config…

726 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question