These parameters include considerations for selecting and configuring
the hardware on which the application servers can run.
Optimize disk speed
Description: Disk speed and configuration can have a dramatic effect
on the performance of application servers that run applications that are heavily
dependent on database support, that use extensive messaging, or are processing
workflow. Using disk I/O subsystems that are optimized for performance, for
example RAID array, are essential components for optimum application server
performance in these environments.
How to view or set: None
Default value: None
Recommended value: Spread the disk processing across as many disks
as possible to avoid contention issues that typically occur with 1 or 2 disk
systems. Placing database tables on disks that are separate from the disks
used for the database log files can reduce disk contention and improve throughput.
Increase processor speed and processor cache
Description: In the absence of other bottlenecks, increasing the
processor speed often helps throughput and response times. A processor with
a larger L2 or L3 cache can yield higher throughput even if the processor
speed is the same as a CPU with a smaller L2 or L3 cache.
How to view or set: None
Default value: None
Recommended value: None
Increase system memory
Description: Increase memory to prevent the system from paging
memory to disk, improving performance. Allow a minimum of 256MB of memory
for each processor. Adjust the available memory when the system is paging
and processor utilization is low because of the paging.
How to view or set: None
Default value: None
Recommended value: 512MB per application server
Run network cards and network switches at full duplex.
Description: Running at half duplex decreases performance. Verify
that the network speed of adapters, cables, switches, and other devices can
accommodate the required throughput.
How to view or set: None
Default value: None
Recommended value: Make sure that the highest speed is in use on
10/100/1000 Ethernet networks.
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tprf_tunehdwcap Last updated: Jun 21, 2007 8:07:48 PM CDT
WebSphere Business Integration Server Foundation, Version 5.0.2 http://publib.boulder.ibm.com/infocenter/wasinfo/index.jsp?topic=/com.ibm.wasee.doc/info/ee/ae/tprf_tunehdwcap.html