What sort of messging scenario is it? Are the messages persisted? How
big are they? If they are persisted are you using virtual disks or
physical devices?
CLIVE wrote:
Hi all,
I have been undertaking some performance profiling of QPID version
0.14 over the last few weeks and I have found a significant
performance drop off when running QPID in a virtual machine.
As an example if I run qpidd on an 8 core DELL R710 with 36G RAM
(RHEL5u5) and then run qpid-perf-test (on the same machine to discount
any network problems) without any command line parameters I am seeing
about 85,000 publish transfers/sec and 80000 consume transfers/sec. If
I run the same scenario on a VM (tried both KVM and VMWare ESXi 4.3
running RHEL5u5) with 2 cores and 8G RAM, I am seeing only 45000
publish transfers/sec and 40000 consume transfers/sec. A significant
drop off in performance. Looking at the cpu and memory usage these
would not seem to be the limiting factors as the memory consumption of
qpidd stays under 200 MBytes and its CPU is up at about 150%; hence
the two core machine.
I have even run the same test on my Mac Book at home using VMWare
Fusion 4 ( 2 Core 4G RAM) and see the same 45000/40000 transfers/sec
results.
I would expect a small drop off in performance when running in a VM,
but not to the extent that I am seeing.
Has anyone else seen this and if so were they able to get to the
bottom of the issue.
Any help would be appreciated.
Clive Lilley
--
James Kirkland
Principal Enterprise Solutions Architect
3340 Peachtree Road, NE,
Suite 1200
Atlanta, GA 30326 USA.
Phone (404) 254-6457 <https://www.google.com/voice#phones>
RHCE Certificate: 805009616436562
