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<div class="moz-cite-prefix">On 09/29/2015 06:14 PM, Groten, Ryan
wrote:<br>
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<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Century
Gothic","sans-serif"">On a cluster I can
configure Memory Optimization “for server loads” (150%
overcommit) or “for desktop loads” (200% overcommit).<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Century
Gothic","sans-serif"">This relates to memory
page sharing right? If so what’s the downside of just
setting it as high as possible?</span></p>
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This is how much more memory you will use to create VMs. Using 150%,
a hypervisor with 10GB of RAM will run up to 15 x 1GB VMs or 10 x
1,5GB VMs and so on. If it happens all VMs using all memory in the
same time, you have KSM working to deduplicate memory pages and, as
a last resource, enough swap to avoid the oom killer.<br>
<br>
The best setting here depends on your workload. If you already know
your VMs will use all memory they have, so the less the better. If
you want a big number of VMs and they are not going to stress the
memory that much, you can play with the values and find what fits
better for you.<br>
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<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Century
Gothic","sans-serif""><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Century
Gothic","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Century
Gothic","sans-serif"">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Century
Gothic","sans-serif"">Ryan</span><span
style="font-size:10.0pt;font-family:"Century
Gothic","sans-serif""><o:p></o:p></span></p>
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