* Paolo Bonzini (pbonzini@xxxxxxxxxx) wrote:
>
>
> On 04/03/2016 15:26, Li, Liang Z wrote:
> >> >
> >> > The memory usage will keep increasing due to ever growing caches, etc, so
> >> > you'll be left with very little free memory fairly soon.
> >> >
> > I don't think so.
> >
>
> Roman is right. For example, here I am looking at a 64 GB (physical)
> machine which was booted about 30 minutes ago, and which is running
> disk-heavy workloads (installing VMs).
>
> Since I have started writing this email (2 minutes?), the amount of free
> memory has already gone down from 37 GB to 33 GB. I expect that by the
> time I have finished running the workload, in two hours, it will not
> have any free memory.
But what about a VM sitting idle, or that just has more RAM assigned to it
than is currently using.
I've got a host here that's been up for 46 days and has been doing some
heavy VM debugging a few days ago, but today:
# free -m
total used free shared buff/cache available
Mem: 96536 1146 44834 184 50555 94735
I very rarely use all it's RAM, so it's got a big chunk of free RAM, and yes
it's got a big chunk of cache as well.
Dave
>
> Paolo
--
Dr. David Alan Gilbert / dgilbert@xxxxxxxxxx / Manchester, UK
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