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UIM collects metrics from WebSphere objects called modules. A module represents a resource category for which data is collected by the WebSphere Performance Management Infrastructure. Each module has at least one XML configuration file that lists a unique identifier for each piece of performance data contained in the module.
Per EJB
The following metrics are collected per Enterprise JavaBean (EJB) on a WebSphere server.
| Metric | Description | Module |
|---|---|---|
CreateCount | The number of times that the Enterprise JavaBeans that are running on the server were created. | beanModule.creates |
RemoveCount | The number of times that the EJBs were removed. | beanModule.removes |
PassivateCount | The number of times that EJBs were removed from the cache. Note that passivation preserves the state of the EJBs on the disk. | beanModule.passivates |
MethodCallCount | The total number of method calls that were made to the EJBs. | beanModule.activates |
MethodResponse TimeMethodResponseTime | The average response time, in milliseconds, on the bean methods. | beanModule.avgMethodRt |
Per
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connection pool
The following metrics are collected per connection pool on a WebSphere server:
| Metric | Description | Module |
|---|---|---|
Connection PoolSizeConnectionPoolSize | The size of the connection pool to the data source. | connectionPoolModu leconnectionPoolModule.poolSize |
FreePoolSi zeFreePoolSize | The number of free connections in the pool. | connectionPoolModu leconnectionPoolModule.freePoolSize |
PercentUsed | The percentage of the connection pool that is currently in use. | connectionPoolModu leconnectionPoolModule.percentUsed |
WaitTime | The 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. | connectionPoolModu leconnectionPoolModule.avgWaitTime |
CloseCount | The total number of connections that were closed. | connectionPoolModu leconnectionPoolModule.numDestroys |
Connection PoolCountConnectionPoolCount | The total number of connections that were created. | connectionPoolModu leconnectionPoolModule.numDestroys |
WaitingThre adCountWaitingThreadCount | The number of threads that are currently waiting for a connection. | |
UseTime | The 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:
| Metric | Description | Module |
|---|---|---|
CPUUsage | The percent of CPU resources that were used since the last query. | systemModule.avgCpuUtilization |
HeapSize | The total amount of memory that is available for the Java Virtual Machine (JVM). | jvmRuntimeModule.totalMemory |
UsedMemory | The amount of memory that is being used by the JVM. | jvmRuntimeModule.usedMemory |
ActiveCount | The number of threads which are concurrently active. | threadPoolModule.activeThreads |
CommittedCo untCommittedCount | The total number of global transactions that have been committed. | transactionModule.globalTransCommitted |
RolledBackCo untRolledBackCount | The total number of global transactions that have been rolled back. | transactionModule.globalTransRolledBack |
LiveCount | The number of servlet sessions that are currently cached in memory. | servletSessionsModule.liveSessions |
TimeSinceLas tActivatedTimeSinceLastActivated | The 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 |
ServletPoolSize | The average number of threads in the servlet connection thread pool. |
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