Please see reply below. Thanks.
--- Joseph Kesselman <[EMAIL PROTECTED]> wrote:
> Many questions here:
>
> What is the base performance comparison of the two machines?
Kim:
Two machines flavors, a desktop PC for development, the Sun box for production
deployment. All existing and generated jar files are migrated to the Sunbox.
Hardware:
- Dell dx240, Pentium III w 256M RAM (running Outlook, netscape, Yahoo
Pager,etc.)
- Sun Solaris Server
Typical Performance Numbers for Operation:
10
Box Timing (sec)
------- --------
Dell PC 1.18
Sunbox 2.56-2.80
> What do you mean by "DOS", and which JVM are you running in that
> environment?
Kim:
DOS Window in Win NT 4.0. Both machines are running JRE 1.3.1. Path and
Classpath environmental variables have been verified.
> What background tasks are running in the Unix box (there usually are
> some)?
Kim:
Various tasks such as Clearcase, editor, tcl scripts. Via top command, very
minimal load, < 10% loaded, run consistently at different times (w less than 5%
variation). Most of the time, these users are in "sleep" status.
> Have you allowed for the fact that I/O has to be process-safe in a
> multitasking system?
> Have you allowed for the fact that process-switching imposes some
> overhead?
> Have you allowed for the fact that the Unix task is competing for memory
> and possibly being swapped out?
> And so on, and on, and on...
>
> .... Generally, comparing performance across two vary different
> environments is nontrivial. There are no simplistic answers.
Kim:
Yes, analytically predicting the performance you mentioned is a non-trival
task, considering we don't have isolated, totally controlled network resources.
However, the bottom line is that there should be an expectation that a mid-end
Sun Server w the identical xerces/xalan jars (release v2.3.1), input xml and
xslt files, and java jre's should perform or exceed, not perform 50% slower,
than a entry-level desktop PC. We have verified that the Sun memory and
processor resources are not overutilized (< 10% memory/processor load). In
fact, the Desktop PC has had a number of MS Office Suite Apps loaded and
running at the same time.
Is there any documented performance or benchmarks published so we can checkout
this discrepancy?
Thanks for your assistance,
=====
Kim
*************************
May the force be with you.
*************************
__________________________________________________
Do You Yahoo!?
Yahoo! Health - Feel better, live better
http://health.yahoo.com
