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PMI is, by default, enabled on the WebSphere server and set to collect the performance metrics used by Uptime Infrastructure Monitor. However, before Uptime Infrastructure Monitor can start collecting information from a WebSphere server, the performance servlet must be deployed in the WebSphere directory that contains your web application.

Per EJB

The following metrics are collected per Enterprise JavaBean (EJB) on a WebSphere server:

MetricExplanationModule
CreateCountThe number of times that the Enterprise JavaBeans that are running on the server were created.beanModule.creates
RemoveCountThe number of times that the EJBs were removed.beanModule.removes
PassivateCountThe number of times that EJBs were removed from the cache. Note that passivation preserves the state of the EJBs on the disk.beanModule.passivates
MethodCallCountThe total number of method calls that were made to the EJBs.beanModule.activates
MethodResponseTimeThe average response time, in milliseconds, on the bean methods.beanModule.avgMethodRt


Per Connection Pool

The following metrics are collected per connection pool on a WebSphere server:

ConnectionPoolSizeThe size of the connection pool to the data source.connectionPoolModule.poolSize
FreePoolSizeThe number of free connections in the pool.connectionPoolModule.freePoolSize
PercentUsedThe percentage of the connection pool that is currently in use.connectionPoolModule.percentUsed
WaitTimeThe average time, in milliseconds, that a connection is used. The average time is the difference between the time at which the connection is allocated and the time at which it is returned.connectionPoolModule.avgWaitTime
CloseCountThe total number of connections that were closed.connectionPoolModule.numDestroys
ConnectionPoolCountThe total number of connections that were created.connectionPoolModule.numDestroys
WaitingThreadCountThe number of threads that are currently waiting for a connection. 
UseTimeThe average time, in milliseconds, that a connection is used. The average use time is the difference between the time at which the connection is allocated and that time at which it is returned.Module.useTime


Other

The following metrics are collected from the WebSphere system, the Java Virtual Machine, the thread pool, or servlets:

CPUUsageThe percent of CPU resources that were used since the last query.systemModule.avgCpuUtilization
HeapSizeThe total amount of memory that is available for the Java Virtual Machine (JVM).jvmRuntimeModule.totalMemory
UsedMemoryThe amount of memory that is being used by the JVM.jvmRuntimeModule.usedMemory
ActiveCountThe number of threads which are concurrently active.threadPoolModule.activeThreads
CommittedCountThe total number of global transactions that have been committed.transactionModule.globalTransCommitted
RolledBackCountThe total number of global transactions that have been rolled back.transactionModule.globalTransRolledBack
LiveCountThe number of servlet sessions that are currently cached in memory.servletSessionsModule.liveSessions
TimeSinceLastActivatedThe difference, in milliseconds, between the previous and current access time stamps of a servlet session. This counter does not include session time out values.servletSessionsModule.timeSinceLastActivated
ServletPoolSizeThe average number of threads in the servlet connection thread pool. 

 

To deploy the performance servlet:

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