EJB Statistics (Oracle GlassFish Server 3.0.1 Administration Guide)

Oracle GlassFish Server 3.0.1 Administration Guide

EJBs fit into the tree of objects as shown in Applications Tree Hierarchy. Use the following dotted name pattern to get applications statistics:

server.applications.appname.ejbmodulename.ejbname.bean-cache.statistic

Statistics available for applications are shown in the following sections:

Use the following dotted name pattern for EJB cache statistics:

server.applications.appname.ejbmodulename.bean-cache.ejbname.statistic

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

Table 8–5 EJB Cache Monitoring Statistics


Statistic	Data Type	Description
`cachemisses`	RangeStatistic	The number of times a user request does not find a bean in the cache.
`cachehits`	RangeStatistic	The number of times a user request found an entry in the cache.
`numbeansincache`	RangeStatistic	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.

Use the following dotted name pattern for EJB container statistics:

server.applications.appname.ejbmodulename.container.ejbname

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

Table 8–6 EJB Container Monitoring Statistics


Statistic	Data Type	Description
`createcount`	CountStatistic	Number of times an EJB’s `create` method is called.
`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.
`pooledcount`	RangeStatistic	Number of entity beans in pooled state.
`readycount`	RangeStatistic	Number of entity beans in ready state.
`removecount`	CountStatistic	Number of times an EJB’s `remove` method is called.

Use the following dotted name pattern for EJB method statistics:

server.applications.appname.ejbmodulename.bean-methods.ejbname.statistic

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

Table 8–7 EJB Method Monitoring Statistics


Statistic	Data Type	Description
`executiontime`	CountStatistic	Time, in milliseconds, spent executing the method for the last successful/unsuccessful attempt to run the operation. This is collected for stateless and stateful session beans and entity beans if monitoring is enabled on the EJB container.
`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.

Use the following dotted name pattern for EJB pool statistics:

server.applications.appname.ejbmodulename.bean-pool.ejbname.statistic

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

Table 8–8 EJB Pool Monitoring Statistics


Statistic	Data Type	Description
`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.
`numbeansinpool`	RangeStatistic	Number of EJBs in the associated pool, providing information about how the pool is changing.
`numthreadswaiting`	RangeStatistic	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.

Use the following dotted name pattern for timer statistics:

server.applications.appname.ejbmodulename.timers.ejbname.statistic

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

Table 8–9 Timer Monitoring 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.