Enterprise bean counters

Enterprise bean counters

Use this page as a reference for properties of enterprise bean counters.

Counter definitions

definitions. These counters report load values, response
Name Key EJB Type ID Description Type Level Overhead Troubleshooting
CreateCount beanModule.creates Stateless Stateful Entity MDB 1 The number of times that beans were created. CountStatistic Basic Low Stateless, MDB: When this value is higher than expected, reference FreedCount and DiscardCount.
RemoveCount beanModule.removes Stateless Stateful Entity MDB 2 The number of times that beans were removed. CountStatistic Basic Low None.
ActivateCount beanModule.activates Stateful Entity 3 The number of times that beans were activated. CountStatistic All Low Stateful: When this value is higher than expected and not using failover, consider changing activation policy to ONCE.
Entity: When this value is higher than expected with option A or B caching, the container cache size could be too small.
PassivateCount beanModule.passivates Entity 4 The number of times that beans were passivated. CountStatistic Basic Low None.
InstantiateCount beanModule.instantiates Stateful Entity 5 The number of times that bean objects were instantiated. CountStatistic All Low None.
FreedCount beanModule.destroys Stateful Entity 6 The number of times that bean objects were freed. CountStatistic All Low None.
LoadCount beanModule.loads Entity 7 The number of times that bean data was loaded from persistent storage. CountStatistic All Low None.
StoreCount beanModule.stores Entity 8 The number of times that bean data was stored in persistent storage. CountStatistic All Low If this value is higher than expected, consider using read-only setting.
ReadyCount beanModule.readyCount Entity 9 The number of bean instances in ready state. RangeStatistic Basic High None.
LiveCount beanModule.concurrentLives Stateless Stateful Singleton Entity MDB 10 The average number of concurrently live beans. RangeStatistic Extended High Stateless, MDB: If this value is consistently higher than pool size, consider increasing the pool size.
Stateful: If this value is higher than expected, the application might be missing calls to remove method.
MethodCallCount beanModule.totalMethodCalls Stateless Stateful Singleton Entity MDB 11 The number of calls to the business methods of the bean. CountStatistic Basic High None.
MethodResponseTime beanModule.avgMethodRt Stateless Stateful Singleton Entity MDB 12 The average response time in milliseconds on the business methods of the bean. AverageStatistic Basic High None.
CreateTime beanModule.avgCreateTime Stateless Stateful Entity MDB 14 The average time in milliseconds for instantiate and PostConstruct. AverageStatistic TimeStatistic All Max None.
RemoveTime beanModule.avgRemoveTime Stateless Stateful Entity MDB 15 The average time in milliseconds for PreDestroy (including the time at the database, if any). AverageStatistic TimeStatistic All Max None.
ActiveMethodCount beanModule.activeMethods Stateless Stateful Singleton Entity MDB 18 The number of concurrently active methods (that is, the number of methods called at the same time). RangeStatistic All High None.
RetrieveFromPoolCount beanModule.getsFromPool Stateless Entity MDB 19 The number of calls retrieving object from the pool. CountStatistic All Low None.
RetrieveFromPoolSuccessCount beanModule.getsFound Stateless Entity MDB 20 The number of times that a retrieve found an object available in the pool. CountStatistic All Low If this value is considerably lower than RetrieveFromPoolCount, consider increasing the pool size.
ReturnsToPoolCount beanModule.returnsToPool Stateless Entity MDB 21 The number of calls returning an object to the pool. CountStatistic Extended Low None.
ReturnsDiscardCount beanModule.returnsDiscarded Stateless Entity MDB 22 The number of times that the returning object was discarded because the pool was full. CountStatistic Extended Low If this value is larger than expected, consider increasing the pool size.
DrainsFromPoolCount beanModule.drainsFromPool Stateless Entity MDB 23 The number of times that the daemon found the pool was idle and attempted to clean it. CountStatistic All Low None.
DrainSize beanModule.avgDrainSize Stateless Entity MDB 24 The average number of objects discarded in each drain. AverageStatistic All Medium None.
PooledCount beanModule.poolSize Entity MDB 25 The current number of objects in the pool. RangeStatistic Basic High None.
MessageCount beanModule.messageCount MDB 26 The number of messages delivered to the onMessage method of the bean. CountStatistic Basic Low None.
MessageBackoutCount beanModule.messageBackoutCount MDB 27 The number of backed out messages that failed to be delivered to the onMessage method of the bean. CountStatistic All Low None.
WaitTime beanModule.avgSrvSessionWaitTime MDB 28 The average time in milliseconds required to obtain a server session from the pool. AverageStatistic TimeStatistic All Medium None.
ServerSessionPoolUsage beanModule.serverSessionUsage MDB 29 The percentage of the server session pool in use. RangeStatistic All High None.
ActivationTime beanModule.activationTime Stateful Entity 30 The average time in milliseconds for activating a bean object. AverageStatistic TimeStatistic All Medium None.
PassivationTime beanModule.passivationTime Stateful Entity 31 The average time in milliseconds for passivating bean object. AverageStatistic TimeStatistic All Medium None.
LoadTime beanModule.loadTime Entity 32 The average time in milliseconds for loading the bean data from persistent storage. AverageStatistic TimeStatistic All Medium None.
StoreTime beanModule.storeTime Entity 33 The average time in milliseconds for storing the bean data to persistent storage. AverageStatistic TimeStatistic All Medium None.
PassivationCount beanModule.passivationCount Stateful 34 The number of beans that are in a passivated state. RangeStatistic Basic Low Stateful: When this value is higher than expected and not using failover, consider changing activation policy to ONCE.
ReadyCount beanModule.methodReadyCount Stateless Stateful 35 The number of bean instances in ready state. RangeStatistic Basic High When this value is lower than expected, consider increasing pool size.
ReadLockTime beanModule.readLockTime Singleton 36 The average time in milliseconds that threads wait for a read lock prior to the invocation of the Singleton methods. TimeStatistic Basic Medium WRITE is the default container-managed concurrency demarcation for all Singleton methods. If this value is higher than expected, ensure that all methods are changed to READ concurrency unless WRITE concurrency is required.
WriteLockTime beanModule.writeLockTime Singleton 37 The average time in milliseconds that threads wait for a write lock prior to the invocation of Singleton methods. TimeStatistic Basic Medium WRITE is the default container-managed concurrency demarcation for all Singleton methods. If this value is higher than expected, ensure that all methods are changed to READ concurrency unless WRITE concurrency is required.
LockCancelCount beanModule.LockCancelCount Singleton 38 The total number of Singleton method invocations that were canceled because they exceeded the specified Access Timeout value. CountStatistic Basic Low If this value is higher than expected, increase the Access Timeout value for this Singleton type, or change the design of the Singleton method to reduce the ReadLockTime and WriteLockTime values.
AsyncWaitTime beanModule.asyncWaitTime Stateless Stateful Singleton 39 The average time asynchronous methods wait on the work manager queue prior to the methods run. TimeStatistic Basic High If this value is higher than expected, increase maximum number of threads in work manager.
AsyncQSize beanModule.asyncQSize Stateless Stateful Singleton 40 The average size of the work manager queue for asynchronous methods. RangeStatistic Basic High If this value is higher than expected, increase maximum number of threads in work manager.
AsyncCancelCount beanModule.asyncCancelCount Stateless Stateful Singleton 41 The number of canceled fire and return results asynchronous methods. CountStatistic Basic Low If this value is higher than expected, review application design along with system and error logs to identify cause of method cancellation.
AsyncFNFFailCount beanModule.asyncFNFFailCount Stateless Stateful Singleton 42 The number of failed fire and forget asynchronous methods. CountStatistic Basic Low Review system and error logs to identify the cause of method failures.
AsyncFutureObjectCount beanModule.asyncFutureObjectCount Stateless Stateful Singleton 43 The number of server-side Future objects from fire and return results asynchronous methods. This statistic is only collected for asynchronous remote business interface methods. CountStatistic Basic High Review the application to ensure all client-side Future objects are tracked and the Future.get() method is called, where all the resources associated with the future object are released. Alternatively, reduce the futureTime attributes of the EJBAsync configuration object. Default value: 86400 (24 hours).
DiscardCount beanModule.discards Stateless Stateful Singleton Entity MDB 44 The number of bean instances that have been discarded. CountStatistic Basic Low Review the system and error logs to identify why the bean instances have been discarded.
MethodCalls beanModule.methods.methodCalls Stateless Stateful Singleton MDB 51 The number of method invocations. CountStatistic Basic High None.
MethodRt beanModule.methods.methodRt Stateless Stateful Singleton MDB 52 The average method response time in milliseconds. For Singleton beans this does not include any time elapsed waiting for a lock. AverageStatistic TimeStatistic All Maximum None.
MethodLoad beanModule.methods.methodLoad Stateless Stateful Singleton MDB 53 The number of concurrent calls to invoke the same method. RangeStatistic All Maximum None.
MethodLevelCallCount beanModule.methodLevelCallCount Stateless Stateful Singleton MDB 54 The number of method invocations made by WebSphere Application Server on the enterprise bean. For message driven beans, this is the number of attempts to deliver messages to the bean onMessage method of the bean. CountStatistic Basic Low None.

The EJB home object is the scope for counters, unless specified otherwise. The following table lists other possible scopes for counters, along with a list of counters that have that scope:

EJB Scope Counters
EJB home object and pool object
RetrieveFromPoolCount
RetrieveFromPoolSuccessCount
ReturnsToPoolCount
ReturnsDiscardCount
DrainsFromPoolCount
DrainSize
PooledCount
EJB bean type
MessageCount
MessageBackoutCount
WaitTime
ServerSessionPoolUsage
PassivationCount
ReadyCount
AsyncWaitTime
AsyncQSize
AsyncCancelCount
AsyncFNFFailCount
AsyncFutureObjectCount
DiscardCount
MethodCalls
MethodRt
MethodLoad
MethodLevelCallCount

Some of the counters can be retrieved with the use of java.management.j2ee.statistics API. The following table lists the available counters, bean type, and API.

statistics API . Available java.management.j2ee.statistics
Counter Bean type java.management.j2ee.statistics API
CreateCount All EJBStats.getCreateCount()
RemoveCount All EJBStats.getRemoveCount()
ReadyCount Entity EntityBeanStats.getReadyCount()
PooledCount Entity EntityBeanStats.getPooledCount()
MessageCount MDB MessageDrivenBeanStats.getMessageCount()
PassiveCount Stateful StatefulSessionBBeanStats.getPassiveCount()
MethodReadyCount All SessionBeanStats.getMethodReadyCount()

Related tasks

Monitor overall system health

PMI data organization
Reference topic

Name	Key	EJB Type	ID	Description	Type	Level	Overhead	Troubleshooting
CreateCount	beanModule.creates	Stateless Stateful Entity MDB	1	The number of times that beans were created.	CountStatistic	Basic	Low	Stateless, MDB: When this value is higher than expected, reference FreedCount and DiscardCount.
RemoveCount	beanModule.removes	Stateless Stateful Entity MDB	2	The number of times that beans were removed.	CountStatistic	Basic	Low	None.
ActivateCount	beanModule.activates	Stateful Entity	3	The number of times that beans were activated.	CountStatistic	All	Low	Stateful: When this value is higher than expected and not using failover, consider changing activation policy to ONCE. Entity: When this value is higher than expected with option A or B caching, the container cache size could be too small.
PassivateCount	beanModule.passivates	Entity	4	The number of times that beans were passivated.	CountStatistic	Basic	Low	None.
InstantiateCount	beanModule.instantiates	Stateful Entity	5	The number of times that bean objects were instantiated.	CountStatistic	All	Low	None.
FreedCount	beanModule.destroys	Stateful Entity	6	The number of times that bean objects were freed.	CountStatistic	All	Low	None.
LoadCount	beanModule.loads	Entity	7	The number of times that bean data was loaded from persistent storage.	CountStatistic	All	Low	None.
StoreCount	beanModule.stores	Entity	8	The number of times that bean data was stored in persistent storage.	CountStatistic	All	Low	If this value is higher than expected, consider using read-only setting.
ReadyCount	beanModule.readyCount	Entity	9	The number of bean instances in ready state.	RangeStatistic	Basic	High	None.
LiveCount	beanModule.concurrentLives	Stateless Stateful Singleton Entity MDB	10	The average number of concurrently live beans.	RangeStatistic	Extended	High	Stateless, MDB: If this value is consistently higher than pool size, consider increasing the pool size. Stateful: If this value is higher than expected, the application might be missing calls to remove method.
MethodCallCount	beanModule.totalMethodCalls	Stateless Stateful Singleton Entity MDB	11	The number of calls to the business methods of the bean.	CountStatistic	Basic	High	None.
MethodResponseTime	beanModule.avgMethodRt	Stateless Stateful Singleton Entity MDB	12	The average response time in milliseconds on the business methods of the bean.	AverageStatistic	Basic	High	None.
CreateTime	beanModule.avgCreateTime	Stateless Stateful Entity MDB	14	The average time in milliseconds for instantiate and PostConstruct.	AverageStatistic TimeStatistic	All	Max	None.
RemoveTime	beanModule.avgRemoveTime	Stateless Stateful Entity MDB	15	The average time in milliseconds for PreDestroy (including the time at the database, if any).	AverageStatistic TimeStatistic	All	Max	None.
ActiveMethodCount	beanModule.activeMethods	Stateless Stateful Singleton Entity MDB	18	The number of concurrently active methods (that is, the number of methods called at the same time).	RangeStatistic	All	High	None.
RetrieveFromPoolCount	beanModule.getsFromPool	Stateless Entity MDB	19	The number of calls retrieving object from the pool.	CountStatistic	All	Low	None.
RetrieveFromPoolSuccessCount	beanModule.getsFound	Stateless Entity MDB	20	The number of times that a retrieve found an object available in the pool.	CountStatistic	All	Low	If this value is considerably lower than RetrieveFromPoolCount, consider increasing the pool size.
ReturnsToPoolCount	beanModule.returnsToPool	Stateless Entity MDB	21	The number of calls returning an object to the pool.	CountStatistic	Extended	Low	None.
ReturnsDiscardCount	beanModule.returnsDiscarded	Stateless Entity MDB	22	The number of times that the returning object was discarded because the pool was full.	CountStatistic	Extended	Low	If this value is larger than expected, consider increasing the pool size.
DrainsFromPoolCount	beanModule.drainsFromPool	Stateless Entity MDB	23	The number of times that the daemon found the pool was idle and attempted to clean it.	CountStatistic	All	Low	None.
DrainSize	beanModule.avgDrainSize	Stateless Entity MDB	24	The average number of objects discarded in each drain.	AverageStatistic	All	Medium	None.
PooledCount	beanModule.poolSize	Entity MDB	25	The current number of objects in the pool.	RangeStatistic	Basic	High	None.
MessageCount	beanModule.messageCount	MDB	26	The number of messages delivered to the onMessage method of the bean.	CountStatistic	Basic	Low	None.
MessageBackoutCount	beanModule.messageBackoutCount	MDB	27	The number of backed out messages that failed to be delivered to the onMessage method of the bean.	CountStatistic	All	Low	None.
WaitTime	beanModule.avgSrvSessionWaitTime	MDB	28	The average time in milliseconds required to obtain a server session from the pool.	AverageStatistic TimeStatistic	All	Medium	None.
ServerSessionPoolUsage	beanModule.serverSessionUsage	MDB	29	The percentage of the server session pool in use.	RangeStatistic	All	High	None.
ActivationTime	beanModule.activationTime	Stateful Entity	30	The average time in milliseconds for activating a bean object.	AverageStatistic TimeStatistic	All	Medium	None.
PassivationTime	beanModule.passivationTime	Stateful Entity	31	The average time in milliseconds for passivating bean object.	AverageStatistic TimeStatistic	All	Medium	None.
LoadTime	beanModule.loadTime	Entity	32	The average time in milliseconds for loading the bean data from persistent storage.	AverageStatistic TimeStatistic	All	Medium	None.
StoreTime	beanModule.storeTime	Entity	33	The average time in milliseconds for storing the bean data to persistent storage.	AverageStatistic TimeStatistic	All	Medium	None.
PassivationCount	beanModule.passivationCount	Stateful	34	The number of beans that are in a passivated state.	RangeStatistic	Basic	Low	Stateful: When this value is higher than expected and not using failover, consider changing activation policy to ONCE.
ReadyCount	beanModule.methodReadyCount	Stateless Stateful	35	The number of bean instances in ready state.	RangeStatistic	Basic	High	When this value is lower than expected, consider increasing pool size.
ReadLockTime	beanModule.readLockTime	Singleton	36	The average time in milliseconds that threads wait for a read lock prior to the invocation of the Singleton methods.	TimeStatistic	Basic	Medium	WRITE is the default container-managed concurrency demarcation for all Singleton methods. If this value is higher than expected, ensure that all methods are changed to READ concurrency unless WRITE concurrency is required.
WriteLockTime	beanModule.writeLockTime	Singleton	37	The average time in milliseconds that threads wait for a write lock prior to the invocation of Singleton methods.	TimeStatistic	Basic	Medium	WRITE is the default container-managed concurrency demarcation for all Singleton methods. If this value is higher than expected, ensure that all methods are changed to READ concurrency unless WRITE concurrency is required.
LockCancelCount	beanModule.LockCancelCount	Singleton	38	The total number of Singleton method invocations that were canceled because they exceeded the specified Access Timeout value.	CountStatistic	Basic	Low	If this value is higher than expected, increase the Access Timeout value for this Singleton type, or change the design of the Singleton method to reduce the ReadLockTime and WriteLockTime values.
AsyncWaitTime	beanModule.asyncWaitTime	Stateless Stateful Singleton	39	The average time asynchronous methods wait on the work manager queue prior to the methods run.	TimeStatistic	Basic	High	If this value is higher than expected, increase maximum number of threads in work manager.
AsyncQSize	beanModule.asyncQSize	Stateless Stateful Singleton	40	The average size of the work manager queue for asynchronous methods.	RangeStatistic	Basic	High	If this value is higher than expected, increase maximum number of threads in work manager.
AsyncCancelCount	beanModule.asyncCancelCount	Stateless Stateful Singleton	41	The number of canceled fire and return results asynchronous methods.	CountStatistic	Basic	Low	If this value is higher than expected, review application design along with system and error logs to identify cause of method cancellation.
AsyncFNFFailCount	beanModule.asyncFNFFailCount	Stateless Stateful Singleton	42	The number of failed fire and forget asynchronous methods.	CountStatistic	Basic	Low	Review system and error logs to identify the cause of method failures.
AsyncFutureObjectCount	beanModule.asyncFutureObjectCount	Stateless Stateful Singleton	43	The number of server-side Future objects from fire and return results asynchronous methods. This statistic is only collected for asynchronous remote business interface methods.	CountStatistic	Basic	High	Review the application to ensure all client-side Future objects are tracked and the Future.get() method is called, where all the resources associated with the future object are released. Alternatively, reduce the futureTime attributes of the EJBAsync configuration object. Default value: 86400 (24 hours).
DiscardCount	beanModule.discards	Stateless Stateful Singleton Entity MDB	44	The number of bean instances that have been discarded.	CountStatistic	Basic	Low	Review the system and error logs to identify why the bean instances have been discarded.
MethodCalls	beanModule.methods.methodCalls	Stateless Stateful Singleton MDB	51	The number of method invocations.	CountStatistic	Basic	High	None.
MethodRt	beanModule.methods.methodRt	Stateless Stateful Singleton MDB	52	The average method response time in milliseconds. For Singleton beans this does not include any time elapsed waiting for a lock.	AverageStatistic TimeStatistic	All	Maximum	None.
MethodLoad	beanModule.methods.methodLoad	Stateless Stateful Singleton MDB	53	The number of concurrent calls to invoke the same method.	RangeStatistic	All	Maximum	None.
MethodLevelCallCount	beanModule.methodLevelCallCount	Stateless Stateful Singleton MDB	54	The number of method invocations made by WebSphere Application Server on the enterprise bean. For message driven beans, this is the number of attempts to deliver messages to the bean onMessage method of the bean.	CountStatistic	Basic	Low	None.

Counter	Bean type	java.management.j2ee.statistics API
CreateCount	All	EJBStats.getCreateCount()
RemoveCount	All	EJBStats.getRemoveCount()
ReadyCount	Entity	EntityBeanStats.getReadyCount()
PooledCount	Entity	EntityBeanStats.getPooledCount()
MessageCount	MDB	MessageDrivenBeanStats.getMessageCount()
PassiveCount	Stateful	StatefulSessionBBeanStats.getPassiveCount()
MethodReadyCount	All	SessionBeanStats.getMethodReadyCount()