mysteriousvoid
Contributor
Contributor

vSphere DRS: VM Startup always on same Host but Memory is at 100%

Hello Community,

we have a little strange behaviour on our platform, which might be an configuration issue but we dont know. The behaviour is as follows: We recently integrated a new ESXi Host into our existing vSphere 6.5 VCSA Cluster. Whenever we power on a virtual machine it is being started on exactly this new ESXi-Host. Of course when recently intergrated ressources where free, but now the RAM is 99% and vSphere still decides to power-on a new virtual machine on that host, but there are others with less overall CPU, RAM usage.

This is how we have setup DRS:

drs.JPG

Maybe someone has an idea where our configuration fault is, we currently did a manual load-balance by migrating virtual machines and turned DRS Automation to Manual, so virtual machines keep where they where last booted.

Thanks for your help in advance!

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3 Replies
ToniSAT
Enthusiast
Enthusiast

Hi,

had the same problem some month ago (after upgrading to 6.5)

Was able to fix it by changing the advacnced cluster settings.

Take a look in the discussion below:

VCSA 6.5 Cluster settings

Best Regards!

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GayathriS
Expert
Expert

Completing what Tonisat said :

Please try the steps provided in below discussion:

VCSA 6.5 Cluster settings

n the web client, Configure tab, Services, vSphere DRS:  In the Advanced Options / Configuration Parameters section, add these two parameters.

Option: FastInitPlace

Value: 0

Option: NetworkAwareDrs

Value: 0

Change is immediate, no further action required.

Please consider marking this answer as "correct" or "helpful" if you think your questions have been answered.

regards

Gayathri

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mysteriousvoid
Contributor
Contributor

What is the actual function behind FastInitPlace and NetworkAwareDrs?

Thanks so far

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