Chapter 9. Open system servers - Windows 315
more physical memory up to a point, will enable the file system cache to grow even larger, up
to these stated maximums.
On a server with a lot of physical memory (2 GB or more), it may be preferable to leave the
option Maximize data throughput for file sharing selected (that is, as long as the total
amount of memory used by the operating system and server applications does not exceed
the amount of physical RAM minus 960 MB). In fact, any application server that can have 960
MB or more of RAM unused, will likely improve performance by enabling the large system
cache.
By enabling this, all of the disk and network I/O performance benefits of using a large file
system cache are realized, and the applications running on the server continue to run without
being memory-constrained.
Some applications have their own memory management optimizers built into them, including
Microsoft SQL Server and Microsoft Exchange. In such instances, the setting above is best
set to Maximize throughput for network applications to let the application manage
memory and their own internal system cache as it sees appropriate.
See Microsoft Knowledge Base article 837331 for more information:
http://support.microsoft.com/?kbid=837331
9.2.4 Disabling unnecessary services
When Windows is first installed, there are some services running on your server that may be
unnecessary. Also when some applications are installed, some services that are not actually
required may be running. These services waste server resources so that you should disable
them.
Services can be seen in the Computer Management console. To view services running on
Windows, right-click My Computer and select Manage. Then the Computer Management
window will appear. Select Services in the left pane of the window. Click the Standard tab at
the bottom of the right-side pane. Then a window similar to that shown in Figure 9-5 on
page 316 will appear.
316 IBM TotalStorage DS6000 Series: Performance Monitoring and Tuning
Figure 9-5 Windows Server 2003 Services window
You should stop services that are not needed to free additional memory to those that need it
most, such as the operating system and user applications. To do this, select a service from
the service list and click Stop.
Also examine the startup values of the installed services. Right-click the service and select
Properties. Select Disabled if you do not want this service to run at all on server startup, or
Manual if you want to start a service only at the time you need to use it.
On Windows Server 2003, many services are added from Window 2000 to strengthen
security. Most of the startup type of them are set to Disabled or Manual by default, but some
of them are set to Automatic. When booted, the services set to Automatic are enabled and
use resources. Actually, some of these services are not required, so you should stop them
and set their startup type to Disabled or Manual. For example, the Print Spooler service is
enabled by default, but usually this service is not required if the server doesn’t work as a print
spooler or doesn’t have a local printer.
Table 9-2 lists the services that should be considered whether the system requires them or
not on Windows Server 2003 system. This list is not applicable for all systems but just the
recommendation for a usual system. For example, File Replication Service (FRS) is normally
required for Active Directory domain controller but, for other servers, this service would not be
required. These services are not disabled by default. Before disabling these services, further
investigation is required.
Table 9-2 Windows startup service recommendations
Service Default Startup Type Recommended Setting
Application Management Manual Disabled

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