VMware Cloud Community
slanger
Enthusiast
Enthusiast
Jump to solution

Large VMDK Performance Issues?

We are experiencing slowdowns on a server that we recently virtualized. Its a database server and the SAS jobs are running longer than usual. the only difference between this one and several others that have almost the same config is that this once has a D drive VMDK that is 1.5TB.

Other than this machine the largest VMDK we have anywhere else is under 500GB and we have never had issues.

Are there known issues with 500GB+ or 1TB+ VMDK's? anyone ever see anything like this? suggestions?

We are running ESX3.5u3 connected to an HP EVA6000.

TIA -Scott

Reply
0 Kudos
1 Solution

Accepted Solutions
depping
Leadership
Leadership
Jump to solution

AFAIK there aren't any know issues. Might want to check with ESXTOP what's actually the problem when running this job.

Duncan

VMware Communities User Moderator

-


Blogging:

Twitter:

If you find this information useful, please award points for "correct" or "helpful".

View solution in original post

Reply
0 Kudos
5 Replies
AntonVZhbankov
Immortal
Immortal
Jump to solution

There are no any known performance issues with large vmdks.


---

VMware vExpert '2009

http://blog.vadmin.ru

EMCCAe, HPE ASE, MCITP: SA+VA, VCP 3/4/5, VMware vExpert XO (14 stars)
VMUG Russia Leader
http://t.me/beerpanda
sbeaver
Leadership
Leadership
Jump to solution

What is the raid configuration and number of spindles did you give that LUN?

Steve Beaver

VMware Communities User Moderator

VMware vExpert 2009

====

Co-Author of "VMware ESX Essentials in the Virtual Data Center"

(ISBN:1420070274) from Auerbach

Come check out my blog: www.theVirtualBlackHole.com

Come follow me on twitter

*Virtualization is a journey, not a project.*

Steve Beaver
VMware Communities User Moderator
VMware vExpert 2009 - 2020
VMware NSX vExpert - 2019 - 2020
====
Co-Author of "VMware ESX Essentials in the Virtual Data Center"
(ISBN:1420070274) from Auerbach
Come check out my blog: [www.virtualizationpractice.com/blog|http://www.virtualizationpractice.com/blog/]
Come follow me on twitter http://www.twitter.com/sbeaver

**The Cloud is a journey, not a project.**
slanger
Enthusiast
Enthusiast
Jump to solution

we have the VMDK on a RAID5 Lun. The Lun is 1.5TB (correction to the above the VMDK is only 1.4TB, no snaps) and rund on a disk group of 42 10K 300GB FC drives.

We have the rest of our virtual datacenter running on the same disk group and no other systems are experiencing issues.

What do you think?

Reply
0 Kudos
depping
Leadership
Leadership
Jump to solution

AFAIK there aren't any know issues. Might want to check with ESXTOP what's actually the problem when running this job.

Duncan

VMware Communities User Moderator

-


Blogging:

Twitter:

If you find this information useful, please award points for "correct" or "helpful".

Reply
0 Kudos
slanger
Enthusiast
Enthusiast
Jump to solution

thanks all. I am digging deeper into the performaceand testing disks with iometer, but still not finding anything promising. 😐

Reply
0 Kudos