EJB Container Statistics (Sun GlassFish Enterprise Server v2.1.1 Administration Guide)

Sun GlassFish Enterprise Server v2.1.1 Administration Guide

The EJB container statistics are described in the following tables:

EJB statistics are described in the following table.

Table 18–1 EJB Statistics


Attribute Name	Data Type	Description
`createcount`	CountStatistic	Number of times an EJB’s `create` method is called.
`removecount`	CountStatistic	Number of times an EJB’s `remove` method is called.
`pooledcount`	RangeStatistic	Number of entity beans in pooled state.
`readycount`	RangeStatistic	Number of entity beans in ready state.
`messagecount`	CountStatistic	Number of messages received for a message-driven bean.
`methodreadycount`	RangeStatistic	Number of stateful or stateless session beans that are in the `MethodReady` state.
`passivecount`	RangeStatistic	Number of stateful session beans that are in `Passive` state.
`activationErrorCount`	CountStatistic	Time (ms) spent executing the method for the last successful/unsuccessful attempt to execute the operation. This is collected for stateless and stateful session beans and entity beans, if monitoring is enabled on the EJB container.

The statistics available for EJB method invocations are listed in the following table.

Table 18–2 EJB Method Statistics


Attribute Name	Data Type	Description
`methodstatistic`	TimeStatistic	Number of times an operation is called; the total time that is spent during the invocation, and so on.
`totalnumerrors`	CountStatistic	Number of times the method execution resulted in an exception. This is collected for stateless and stateful session beans and entity beans if monitoring is enabled for the EJB container.
`totalnumsuccess`	CountStatistic	Number of times the method successfully executed. This is collected for stateless and stateful session beans and entity beans if monitoring enabled is true for EJB container.
`executiontime`	CountStatistic	Time (ms) spent executing the method for the last successful/unsuccessful attempt to execute the operation. This is collected for stateless and stateful session beans and entity beans if monitoring is enabled on the EJB container.

The statistics available for EJB pools are listed in the following table.

Table 18–3 EJB Pool Statistics


Attribute Name	Data Type	Description
`numbeansinpool`	BoundedRangeStatistic	Number of EJB’s in the associated pool, providing an idea about how the pool is changing.
`numthreadswaiting`	BoundedRangeStatistic	Number of threads waiting for free beans, giving an indication of possible congestion of requests.
`totalbeanscreated`	CountStatistic	Number of beans created in associated pool since the gathering of data started.
`totalbeansdestroyed`	CountStatistic	Number of beans destroyed from associated pool since the gathering of data started.
`jmsmaxmessagesload`	CountStatistic	The maximum number of messages to load into a JMS session at one time for a message-driven bean to serve. Default is 1. Applies only to pools for message driven beans.

The statistics available for EJB caches are listed in the following table.

Table 18–4 EJB Cache Statistics


Attribute Name	Data Type	Description
`cachemisses`	BoundedRangeStatistic	The number of times a user request does not find a bean in the cache.
`cachehits`	BoundedRangeStatistic	The number of times a user request found an entry in the cache.
`numbeansincache`	BoundedRangeStatistic	The number of beans in the cache. This is the current size of the cache.
`numpassivations`	CountStatistic	Number of passivated beans. Applies only to stateful session beans.
`numpassivationerrors`	CountStatistic	Number of errors during passivation. Applies only to stateful session beans.
`numexpiredsessionsremoved`	CountStatistic	Number of expired sessions removed by the cleanup thread. Applies only to stateful session beans.
`numpassivationsuccess`	CountStatistic	Number of times passivation completed successfully. Applies only to stateful session beans.

The statistics available for Timers are listed in the following table.

Table 18–5 Timer Statistics


Statistic	Data Type	Description
`numtimerscreated`	CountStatistic	Number of timers created in the system.
`numtimersdelivered`	CountStatistic	Number of timers delivered by the system.
`numtimersremoved`	CountStatistic	Number of timers removed from the system.