Use this page to select the advice you wish to enable or disable.
To view this administrative page, click Servers > Application
Servers > server_name . Under the Performance section, click Performance and Diagnostic Advisor Configuration > Performance
and Diagnostic Advice Configuration.
Configuration tab
Advice name
Specifies the advice that you can enable or disable.
Advice applied to component
Specifies the WebSphere Application Server component to which the
advice applies.
Advice type
Categorizes the primary indent of a piece of Advice.
Use Advice type for grouping, and then enabling or disabling sets of advice
that is based upon your purpose. Advice has the following types:
- Performance: Performance advice provides tuning recommendations, or identifies
problems with your configuration from a performance perspective.
- Diagnostic: Diagnostic advice provide automated logic and analysis relating
to problem identification and analysis. These types advice are usually issued
when unexpected circumstances are encountered by the application server.
Performance impact
Generalizes the performance overhead that an alert might incur.
The performance impact of a particular piece of advice is highly dependant
upon the scenario being run and upon the conditions meet. The performance
categorization of alerts is based upon worst case scenario measurements.
The performance categorizations are:
- Low: Advice has minimal performance overhead. Advice might be
run in test and production environments. Cumulative performance overhead
is within run to run variance when all advice of this type is enabled.
- Medium: Advice has measurable but low performance overhead. Advice
might be run within test environments, and might be run within production
environments if deemed necessary. Cumulative performance overhead is less
than 4% when all advice of this type is enabled.
- High: Advice impact is high or unknown. Advice might be run during
problem determination tests and functional tests. It is not run in production
simulation or production environments unless deemed necessary. Cumulative
performance overhead might be significant when all advice of this type is
enabled.
Advice status
Specifies whether the advice is stopped, started, or unavailable.
The advice status has one of three values:
Started,
Stopped or
Unavailable.
- Started: The advice is enabled.
- Stopped: The advice is not enabled.
- Unavailable: The advice does not apply to the current configuration,
for example, persisted session size advice in a configuration without persistent
sessions.