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

Posted on 2013-01-14
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Last Modified: 2013-01-16
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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Question by:sblanken
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LVL 119
ID: 38776091
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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by:DarinTCH
DarinTCH earned 500 total points
ID: 38776168
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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Author Comment

by:sblanken
ID: 38776198
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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LVL 119
ID: 38776220
do you have any other VMs on iSCSI LUNs with startup, slow issues?
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Author Comment

by:sblanken
ID: 38776337
we have other servers connected through iscsi to the cx4, hosting VMs with no issues at all
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Accepted Solution

by:
DarinTCH earned 500 total points
ID: 38776392
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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Author Comment

by:sblanken
ID: 38783777
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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