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WEBSPHERE PORTAL V6.1 TUNING GUIDE
S E S S I O N T I M E O U T
Session timeout: The default value of Session Timeout is 30 minutes. Reducing this
value to a lower number can help reduce memory consumption requirements, allowing a
higher user load to be sustained for longer periods of time. Reducing the value too low can
interfere with the user experience.
For Solaris, on a T5240 hardware, we used a much lower think time, 5 seconds, than was
used for other platform hardware measurement of 12 seconds. With a lower thinktime, fewer
vusers will result in a heavier load on the system. The reason we lowered the thinktime was
specifically to decrease the number of vusers required for this measurement. Our pool of
LoadRunner vuser licenses was inadequate to generate enough load with the higher think
time. With a shorter think time than is used in the other measurements, the duration of each
virtual user's interaction with the site is shorter by approximately 2 minutes. To compensate
for this, and keep the sessions live on the server for the same period of time, we increased
the session timeout by 2 minutes, to 12 minutes.
How To Set: In the WebSphere Administrative Console: Servers Application Servers
WebSphere Portal Container Settings: Web Container Settings Session Management
Session Timeout -> Set Timeout
Parameter
AIX
POWER5
Linux Solaris
Windows
2003
z/Linux z/OS
Session
timeout
10 minutes 10 minutes 12 minutes 10 minutes 10 minutes 10 minutes
W E B C O N T A I N E R T H R E A D P O O L S I Z E
Servlet engine thread pool size: Set this value and monitor the results. Increase this value if
all the servlet threads are busy most of the time.
How To Set: In the WebSphere Administrative Console: Servers Application Servers
WebSphere Portal Additional Properties: Thread Pools Web Container Thread Pool
- Minimum size threads - Maximum size threads
Parameter
AIX
POWER5
Linux Solaris
Windows
2003
z/Linux z/OS
Web Container
Thread pool
size
50 50 50 50 50 50
