[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimiz
From: |
Li, Liang Z |
Subject: |
Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization |
Date: |
Wed, 9 Mar 2016 06:18:00 +0000 |
> 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.
>
> Paolo
I have a VM which has 2GB of RAM, when the guest booted, there were about 1.4GB
of free pages.
Then I tried to download a large file from the internet with the browser, after
the downloading finished,
there were only 72MB of free pages left, as Roman pointed out, there were quite
a lot of Cached memory.
Then I tried to compile the QEMU, after the compiling finished, there were
about 1.3G free pages.
So even the cache will increase to a large amount, it will be freed if there
are some other specific workloads.
The cache memory is a big issue that should be taken into consideration.
How about reclaim some cache before getting the free pages information?
Liang
- Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization, (continued)
- Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization, Michael S. Tsirkin, 2016/03/05
- Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization, Li, Liang Z, 2016/03/07
- Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization, Michael S. Tsirkin, 2016/03/07
- Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization, Li, Liang Z, 2016/03/07
- Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization, Roman Kagan, 2016/03/09
- Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization, Paolo Bonzini, 2016/03/04
- Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization, Dr. David Alan Gilbert, 2016/03/04
- Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization, Li, Liang Z, 2016/03/07
- Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization, Roman Kagan, 2016/03/09
- Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization, Li, Liang Z, 2016/03/09
- Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization,
Li, Liang Z <=
Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization, Roman Kagan, 2016/03/04
- Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization, Li, Liang Z, 2016/03/04
- Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization, Roman Kagan, 2016/03/04
- Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization, Dr. David Alan Gilbert, 2016/03/04
- Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization, Li, Liang Z, 2016/03/04
- Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization, Michael S. Tsirkin, 2016/03/04
- Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization, Li, Liang Z, 2016/03/04
- Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization, Michael S. Tsirkin, 2016/03/04
- Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization, Li, Liang Z, 2016/03/04
- Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization, Michael S. Tsirkin, 2016/03/08