IBM WEBSPHERE 6.1.X - Manual (Page 51)

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W E B S P H E R E P O R T A L V 6 . 1 T U N I N G G U I D E
CLUSTER TUNING
The Base Portal Scenario is measured in a three-node horizontal cluster environment,
with or without session persistence, and six-members vertical cluster environment.
In general, the same tuning that was used for the Base Portal Scenario was used for
cluster. The additional settings are mentioned below:
Application Server Tuning
D Y N A C A C H E C U S T O M P R O P E R T I E S
There are several properties which can be set to reduce the number and size of
Dynacache messages sent between nodes. This will improve scalability and reduce
resource consumption in a clustered Portal environment. To set these properties, do the
following:
1) Open and log in to the Administrative Console.
2) Click Application servers -> WebSphere_Portal -> Java and Process
Management -> Process Definition -> Java Virtual Machine -> Custom
properties -> New
3) Under General Properties, add the following information:
Name: com.ibm.ws.cache.CacheConfig.ignoreValueInInvalidationEvent
Value: true
Name: com.ibm.ws.cache.CacheConfig.filterTimeOutInvalidation
Value: true
Name: com.ibm.ws.cache.CacheConfig.filterLRUInvalidation
Value: true
Z / O S D Y N A C A C H E C U S T O M P R O P E R T Y
A custom property has been defined: com.ibm.ws.cache.CacheConfig.
propogateInvalidationsNotShared , which when set to true leads to invalidations
being sent for cache entry insertions and updates for a NOT_SHARED cache instance.
This property should be removed on z/OS configurations as it has a major impact on
performance.
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