Use this page to specify settings for performance monitoring,
including enabling performance monitoring, selecting the Performance
Monitoring Infrastructure (PMI) module and setting monitoring levels.
To view this administrative console page, click Servers > Application Servers > server > Performance Monitoring
Infrastructure (PMI).
Configuration tab
Enable Performance Monitoring Infrastructure (PMI)
Specifies whether the application server attempts to enable
Performance Monitoring Infrastructure (PMI). If an application server
is started when the PMI is disabled, you have to restart the server
in order to enable it.
Use sequential counter updates
Specifies whether access to PMI counters (for example,
updates to the counters) is sequential. There is some performance
overhead associated with enabling sequential update. The default setting
is false.
Currently monitored statistic set
Specifies a pre-defined set of Performance Monitoring Infrastructure
(PMI) statistics for all components in the server.
As part of fine-grained control feature, WebSphere Application
Server provides new statistic sets, which are pre-defined, fixed server-side
sets based on the PMI statistic usage scenarios. This enhancement
allows a set of statistics to be enabled via a single action or call.
The following statistic sets are defined:
- None
- All statistics are disabled.
- Basic
- Provides basic monitoring for application server resources and
applications. This includes J2EE components, HTTP session information,
CPU usage information, and the top 38 statistics. This is the default
setting.
Note: The following two statistics
have been moved from the basic set of PMI statics to the All set.
Because these two statistics are no longer enabled by default, only
the top 36 statistics are provided instead of the top 38:
- Web Applications.URIRequestCount
- Web Applications.URIServiceTime
- Extended
- Provides extended monitoring, including the basic level of monitoring
plus workload monitor, performance advisor, and Tivoli resource models.
Extended provides key statistics from frequently used WebSphere Application
Server components.
- All
- Enables all statistics.
- Custom
- Provides fine-grained control with the ability to enable and disable
individual statistics.
Runtime tab
Use sequential counter updates
Specifies whether access to PMI counters (for example,
updates to the counters) is sequential. There is some performance
overhead associated with enabling sequential update. The default setting
is false.
Persist my changes
Specifies whether changes to the runtime are also persisted
for use on subsequent server startups, and not just the current server
runtime. The default setting is false.
Selecting the Persist my changes option
ensures that the counter settings are retained after you restart the
server.
Currently monitored statistic set
Specifies a pre-defined set of Performance Monitoring Infrastructure
(PMI) statistics for all components in the server.
As part of fine-grained control feature, WebSphere Application
Server provides new statistic sets, which are pre-defined, fixed server-side
sets based on the PMI statistic usage scenarios. This enhancement
allows a set of statistics to be enabled via a single action or call.
The following statistic sets are defined:
- None
- All statistics are disabled.
- Basic
- Provides basic monitoring for application server resources and
applications. This includes J2EE components, HTTP session information,
CPU usage information, and the top 38 statistics. This is the default
setting.
Note: The following two statistics
have been moved from the basic set of PMI statics to the All set.
Because these two statistics are no longer enabled by default, only
the top 36 statistics are provided instead of the top 38:
- Web Applications.URIRequestCount
- Web Applications.URIServiceTime
- Extended
- Provides extended monitoring, including the basic level of monitoring
plus workload monitor, performance advisor, and Tivoli resource models.
Extended provides key statistics from frequently used WebSphere Application
Server components.
- All
- Enables all statistics.
- Custom
- Provides fine-grained control with the ability to enable and disable
individual statistics.