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We appear to have a problem with Ubuntu guests running out of memory. We have several on 12.04 (LTS) and one on 13.04 and seem to have the same problem.

It takes around 30 days from restart to running out of memory.

It is likely that the problem lies with the Integration Services, when Ubuntu is run on bare metal (apparently) it can go for years without being rebooted.

Is there a solution?

Should we reboot Linux (Ubuntu) VM's regularly?

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Are you able to see what is causing the memory to be used up? Is the console unresponsive at this time? What makes you think that it is the integration services? Ideally you should provide a bit more information to allow people to help you. –  john Aug 13 '13 at 10:44
    
There's nothing magical about Ubuntu or any other operating system that means it will always run for 'years' on bare metal without suffering from memory leaks or other bugs. Having said that it could be a problem with integration services, or it could be just about anything else so this needs to be investigated from the ground up, I'm afraid. For a start, what are the guests actually doing? –  RobM Aug 13 '13 at 11:00
    
@John, I will provide more info when the next VM runs out of memory. I was in the gym when I got the uptimerobot message, and all I could do using my iPhone was to hard-stop the VM and start it (we had to get it up right away). –  RogerI Aug 13 '13 at 14:10
    
I suspect integration services based on the opinion of a friend, based on the experience of his company. The VM is a LAMP server running WordPress. Pretty vanilla installation. It's also running something called eHour (which is usually the first to go down). We have other Ubuntu VMs running Rails and Apache with MySQL. –  RogerI Aug 13 '13 at 14:12
    
Any os can go for years without a reboot, its typically applications/services that will take you down and or virus since things haven't been patched.. look in the application services\microsoft\hyper-v-intergration event logs do you see anything abnormal there? –  tony roth Aug 13 '13 at 14:34
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