Compaq ProLiant 1000 Performance of Microsoft Exchange Server 4.0 on Compaq Pr - Page 10

Processor Subsystem

Get Compaq ProLiant 1000 PDF manuals and user guides View all Compaq ProLiant 1000 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 10 highlights

444A/0696 WHITE PAPER (cont.) 1...0 • System memory - all the server's memory resource, but not including cache memory on processor boards or drive arrays. This is the amount of RAM installed in the system. The data shows that Exchange Server is primarily processor intensive. That is to say, the first resource to be consumed in an Exchange Server machine is the processor. With that in mind, most of the following data will be centered around an analysis of performance with varying CPU configurations. After the processor subsystem, it is a tossup between the disk subsystem and system memory as to which is more crucial. It's a bit of a balance, i.e. if the server has a high performance disk subsystem, then the system memory is more likely to reach capacity first. Conversely, if the system has lots of memory, then the disk subsystem is likely to reach capacity first. The cardinal rule to remember is this:if a subsystem is not a bottleneck, then adding more of that resource will not help the problem. In all likelihood, it will merely amplify the existing weakness in the system. For example, if an Exchange Server exhibits poor response time - and the processor subsystem is not a bottleneck - then adding more processors to the server will not improve response time. Following the processor subsystem section are some data pertaining to the disk subsystem and system memory. While there's enough variables in those to warrant a white paper of their own, these sections are included to provide a feel for how the Exchange Server system responds as different resources are adjusted. Processor Subsystem As mentioned above, the processor subsystem is usually the first to be exhausted in an Exchange Server system. Following are graphs showing how the different processor and server products from Compaq affect the performance of Microsoft Exchange Server. The value on the vertical axis is theLoadSim Score. The value on the horizontal axis is the number of LoadSim users. 1P indicates one processor installed in the server, 2P indicates two processors, etc. Each section will describe the individual configuration of the Exchange Server computer being tested. In all these test, the Exchange Server computer is configured as shown, and Exchange Optimizer is run to set the Exchange system parameters. No manual tuning was done.

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
W
HITE
P
APER
(cont.)
10
444A/0696
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
•
System memory - all the server’s memory resource, but not including cache memory on
processor boards or drive arrays. This is the amount of RAM installed in the system.
The data shows that Exchange Server is primarily processor intensive. That is to say, the first
resource to be consumed in an Exchange Server machine is the processor. With that in mind,
most of the following data will be centered around an analysis of performance with varying CPU
configurations.
After the processor subsystem, it is a tossup between the disk subsystem and system memory as to
which is more crucial. It’s a bit of a balance, i.e. if the server has a high performance disk
subsystem, then the system memory is more likely to reach capacity first. Conversely, if the
system has lots of memory, then the disk subsystem is likely to reach capacity first.
The cardinal rule to remember is this:
if a subsystem is not a bottleneck, then adding more of that
resource will not help the problem
. In all likelihood, it will merely amplify the existing weakness
in the system. For example, if an Exchange Server exhibits poor response time - and the processor
subsystem is not a bottleneck - then adding more processors to the server will not improve
response time.
Following the processor subsystem section are some data pertaining to the disk subsystem and
system memory. While there’s enough variables in those to warrant a white paper of their own,
these sections are included to provide a feel for how the Exchange Server system responds as
different resources are adjusted.
Processor Subsystem
As mentioned above, the processor subsystem is usually the first to be exhausted in an Exchange
Server system. Following are graphs showing how the different processor and server products
from Compaq affect the performance of Microsoft Exchange Server.
The value on the vertical axis is the
LoadSim Score. The value on the horizontal axis is the
number of LoadSim users.
1P indicates one processor installed in the server, 2P indicates two processors, etc. Each section
will describe the individual configuration of the Exchange Server computer being tested.
In all these test, the Exchange Server computer is configured as shown, and Exchange Optimizer
is run to set the Exchange system parameters. No manual tuning was done.