Re: Poor disk (virtio) Performance Inside KVM virt-machine vs host machine

From: Alan Hodgson <ahodgson(at)lists(dot)simkin(dot)ca>
To: pgsql-performance(at)postgresql(dot)org
Subject: Re: Poor disk (virtio) Performance Inside KVM virt-machine vs host machine
Date: 2016-04-26 20:47:06
Message-ID: 1946315.2Ik0VxksvJ@skynet.simkin.ca
Views: Raw Message | Whole Thread | Download mbox | Resend email
Thread:
Lists: pgsql-performance

On Tuesday, April 26, 2016 11:21:15 AM Michael Nolan wrote:
> On Tue, Apr 26, 2016 at 10:03 AM, Artem Tomyuk <admin(at)leboutique(dot)com> wrote:
> > Hi All.
> >
> > I've noticed that there is a huge (more than ~3x slower) performance
> > difference between KVM guest and host machine.
>
> Is this unique to KVM, or do similar things happen with other virtualizers?
> --
> Mike Nolan

CentOS 6.5 is pretty old. KVM/qemu is definitely faster in newer versions.

It will always be slower than native though. Any virtualization will be slower
than native.

In response to

Browse pgsql-performance by date

  From Date Subject
Next Message Merlin Moncure 2016-04-26 20:52:38 Re: Poor disk (virtio) Performance Inside KVM virt-machine vs host machine
Previous Message Artem Tomyuk 2016-04-26 15:27:04 Re: Poor disk (virtio) Performance Inside KVM virt-machine vs host machine