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VMs slow - using only ~1GB of it's assigned memory

Hi,

we had to move some VMs from a storage device to another ( 2 VMs hosted into a hyper-v 2008 OS server (32 GB RAM)). When we start the VMs now they do start but it takes ~15 minutes for each and it looks like they use only ~1 GB (instead of 15GB and 14GB that they have), so the VMs run really slow.

Any help would be appreciated.
Please let me know if you need any further info.

Thanks,
Rezart
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sblanken
Asked:
sblanken
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2 Solutions
 
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Is the datastore configuration the same as the original server?

Is the specification of the host server, the same as the previous server?
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DarinTCHSenior CyberSecurity EngineerCommented:
how did you move?
Export?
migration?
are these the only 2 u moved or the only 2 having issues
Are the Hosts configured the same and the same level of OS/SP
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sblankenAuthor Commented:
thank you for your immediate reply:
setup before: host with 2 VMs on its E: drive (LUN on CX3 storage device through fiber)
setup after: we connected another LUN through iSCSI and copied the VMs (after shuting them down) and presented this as E: drive. After a restart of the host, the machines start but very slow.
these 2 are the only machines hosted on this host.
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
do you have any other VMs on iSCSI LUNs with startup, slow issues?
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sblankenAuthor Commented:
we have other servers connected through iscsi to the cx4, hosting VMs with no issues at all
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DarinTCHSenior CyberSecurity EngineerCommented:
I ran into something similar last week - but the storage was local
fortunately I had imported...
so I killed the VMs and imported a second time making sure I choose the unique Identifier chi box
and they started working ....
It drove me nuts they started up for 20-30 minutes
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sblankenAuthor Commented:
Took us a day to troubleshoot on this, however issue solved, the bottleneck might have been the iSCSI connection (on the host hyper-v server), once installing fresh hyper-v 2012 OS on the core server with the latest drivers and the VMs are working properly.

Thank you,
Rezart
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