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4.9.2 Disabling event distribution for Common Event Infrastructure
The event server that manages events can be configured to distribute events and log them to
the event database. Some mediations only require events to be logged to a database. For
these cases, performance improves by disabling event distribution. Because the event server
might be used by other applications, it is important to check that none of them use event
monitoring, which requires event distribution before disabling event distribution.
Event distribution can be disabled from the administrative console by clicking Service
integration Common Event Infrastructure Event service Event services
Default Common Event Infrastructure event server. Clear the Enable event distribution
check box.
4.9.3 Configuring WebSphere Service Registry and Repository cache timeout
WebSphere Service Registry and Repository (WSRR) is used by WebSphere ESB for
endpoint lookup. When accessing the WSRR (for example, using the endpoint lookup
mediation primitive), results from the registry are cached in WebSphere ESB. You can
configure the lifetime of the cached entries from the administrative console by clicking
Service Integration WSRR Definitions and entering the WSRR definition name. Then
click Timeout of Cache and set a value for the cached registry results.
Validate that the timeout is a sufficiently large value. The default timeout is 300 seconds,
which is reasonable from a performance perspective. A value that is too low results in
frequent lookups to the WSRR, which can be expensive (especially if retrieving a list of
results) and includes the associated network latency if the registry is on a remote machine.
4.10 Business Monitor tuning
This section provides advanced tuning suggestions for Business Monitor.
4.10.1 Configuring Java heap sizes
The default maximum heap size in most implementations of Java is too small for many of the
servers in this configuration. The Business Monitor Launchpad installs the Business Monitor
and its prerequisite servers with larger heap sizes, but you might check that these sizes are
appropriate for your hardware and workload.
4.10.2 Configuring Common Event Infrastructure
By default, when an event arrives at CEI, it is delivered to the registered consumer (in this
case, a particular monitor model) and into an additional default queue. Performance improves
by avoiding this double-store by removing the All Events event group:
1. In the administrative console, click Service Integration Common Event
Infrastructure Event Service Event Services Default Common Event
Infrastructure event server Event Groups
2. Remove the event group.
76 IBM Business Process Manager V8.0 Performance Tuning and Best Practices