High CPU on Hyper-V VM
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@Dashrender said:
@garak0410 said:
@Dashrender said:
I'd be curious what happens if you unplugged the switch ports for a few moments, then reconnected. Though I can't tell you why I'm curious about that.
The physical switch? That was next on my list...it is time for a switch upgrade in our main "server room."
Yep.
It is interesting that it kills the performance on just one VM and not the other two...but if this does come back again before "resolving" this, I will do that first...
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It is happening RIGHT NOW...going to look at switch port...will report back findings...
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How many network connections are on that VMhost?
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@Dashrender said:
How many network connections are on that VMhost?
Well, first up, I can't even get to this host, physically or RDP. The desktop shows up but can't click start or bring up task manager...this is some serious stuff...
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@garak0410
I assume you mean you can't get the console to show you anything? -
@Dashrender said:
@garak0410
I assume you mean you can't get the console to show you anything?I walked upstairs to the virtual host, logged in and the desktop was frozen...couldn't do anything...CTRL-ALT-DEL produced the screen where I can choose task manager but nothing clickable...I RPDed into the VM"s and shutdown gracefull and then fat fingered the virtual host...it is coming up now...
You still think it can be switch/switch port related? Enough to lock up (not responding to mouse clicks) the physical server like that?
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You think this may warrant a call to Microsoft?...I am guessing I have 1 or 2 calls allowed a year...or we'll just pay for the calls...Dell did help me a lot but ended up wanting to blame the anti-virus...there is no anti-virus on the host...and this time the host locked up...
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@garak0410 AV on the host set to not scan any folder containing vm drives? (VHD etc)
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@MattSpeller said:
@garak0410 AV on the host set to not scan any folder containing vm drives? (VHD etc)
There is no A/V on the host...it is pretty plain vanilla...just hosts 3 VM's...
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@MattSpeller said:
@garak0410 said:
...there is no anti-virus on the host...
I can't read, sorry
No worries...you should be in my shoes...going crazy...I've had stability for nearly all of my 4 years here...2015 has been tough with these problems...
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@garak0410 said:
No worries...you should be in my shoes...going crazy...I've had stability for nearly all of my 4 years here...2015 has been tough with these problems...
Any chance you can migrate the VM's off to somewhere else and nuke/pave the host?
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I had this issue on Hyper-V when I first got our new VM host. It turned out to be several bad memory modules. Got them replaced under warranty and haven't had an issue since.
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@coliver said:
I had this issue on Hyper-V when I first got our new VM host. It turned out to be several bad memory modules. Got them replaced under warranty and haven't had an issue since.
Really? High CPU on a VM related to RAM? That is interesting and something I may look at...any recommendations on memory? (Brand or Store) Or I could get it from Dell...
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@garak0410 said:
@coliver said:
I had this issue on Hyper-V when I first got our new VM host. It turned out to be several bad memory modules. Got them replaced under warranty and haven't had an issue since.
Really? High CPU on a VM related to RAM? That is interesting and something I may look at...any recommendations on memory? (Brand or Store) Or I could get it from Dell...
Yep, I have no idea why it was the case but it resulted in high CPU usage and the console being locked up like you are mentioning. No RAM recommendations.
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@coliver said:
@garak0410 said:
@coliver said:
I had this issue on Hyper-V when I first got our new VM host. It turned out to be several bad memory modules. Got them replaced under warranty and haven't had an issue since.
Really? High CPU on a VM related to RAM? That is interesting and something I may look at...any recommendations on memory? (Brand or Store) Or I could get it from Dell...
Yep, I have no idea why it was the case but it resulted in high CPU usage and the console being locked up like you are mentioning. No RAM recommendations.
Thank you...it is worth a try and got approval to purchase RAM...
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This is across all VMs on the host or just one of them? Sorry, my situation was across all VMs. Made it impossible to use the host for 15-20 minutes at a time. Then it would... cycle... or something... to release the bad RAM? and everything would go back to normal. Then it would happen again at random intervals. Thankfully I was just testing the host so it wasn't in production yet.
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@coliver said:
This is across all VMs on the host or just one of them? Sorry, my situation was across all VMs. Made it impossible to use the host for 15-20 minutes at a time. Then it would... cycle... or something... to release the bad RAM? and everything would go back to normal. Then it would happen again at random intervals. Thankfully I was just testing the host so it wasn't in production yet.
The main VM affected is our FILE SERVER VM...it will peg out at 100%...the other servers not so much but however, this most recent time, the Virtual Host did "lock up' and described above...I could not get it to clock on anything or get into task manager...after I was able to remote in and gracefully shut down the VM's and waited until I felt like they were down, I fat fingered the Virtual Host...and it is running perfectly now...the thing is, this will return again in a few days and power down seems to help each time for a few days...
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I am calling Dell just as a backup option...I want this resolved..
