Thx.
All queries are now running as usual.
Thx for helping me.
Best regards
Sven
-Ursprüngliche Nachricht-
Von: pgsql-performance-ow...@postgresql.org
[mailto:pgsql-performance-ow...@postgresql.org] Im Auftrag von Albe Laurenz
Gesendet: Montag, 25. April 2016 10:08
An: 'Sven Kerkling
Hi All.
I've noticed that there is a huge (more than ~3x slower) performance
difference between KVM guest and host machine.
Host machine:
dell r720xd
RAID10 with 12 SAS 15 k drives and RAID0 with 2*128 GB INTEL SSD drives in
Dell CacheCade mode.
*On the KVM guest:*
/usr/pgsql-9.4/bin/pg_test_f
>I've noticed that there is a huge (more than ~3x slower) performance
difference between KVM guest and host machine.
I don't know that this is relevant or not , but there is an IBM research
paper (Published in 2014)
"IBM Research Report - An Updated Performance Comparison of Virtual
Machines and L
On Tue, Apr 26, 2016 at 10:03 AM, Artem Tomyuk 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
I didn't compare impact of virtualization on other hypervisors yet.
2016-04-26 18:21 GMT+03:00 Michael Nolan :
>
>
> On Tue, Apr 26, 2016 at 10:03 AM, Artem Tomyuk
> wrote:
>
>> Hi All.
>>
>> I've noticed that there is a huge (more than ~3x slower) performance
>> difference between KVM guest and
On Tuesday, April 26, 2016 11:21:15 AM Michael Nolan wrote:
> On Tue, Apr 26, 2016 at 10:03 AM, Artem Tomyuk 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
On Tue, Apr 26, 2016 at 10:27 AM, Artem Tomyuk wrote:
> I didn't compare impact of virtualization on other hypervisors yet.
My rule of thumb is 50% hit for 1:1 host:guest. Virtualization is
not free. If that's a pain try using 100% native solutions (docker,
etc)
merlin
--
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