J2C connection pool counters: WAS v5.1

J2C connection pool counters

The Java 2 Connector (J2C) connection pool counters are used to monitor the J2C connection pool performance. You can find the data using the Tivoli Performance Viewer and by looking under each appserver. Click...
application_server | J2C connection pool

Counter definitions

Name Key Description Granularity Type Level
Num managed connections j2cModule.numManagedConnections Number of ManagedConnection objects in use Per connection factory CountStatistic Low
Num connection handles j2cModule.numConnectionHandles Number of connections that are associated with ManagedConnections (physical connections) in this pool Per connection factory CountStatistic Low
Num Connections Created j2cModule.numManagedConnectionsCreated Total number of managed connections created Per connection factory CountStatistic Low
Num Connections Destroyed j2cModule.numManagedConnectionsDestroyed Total number of managed connections destroyed Per connection factory CountStatistic Low
Num Connections Allocated j2cModule.numManagedConnectionsAllocated Total number of times a managed connection is allocated to a client (the total is maintained across the pool, not per connection). Per connection factory CountStatistic Low
Num Connections Freed j2cModule.numManagedConnectionsReleased Total number of times a managed connection is released back to the pool (the total is maintained across the pool, not per connection). Per connection factory CountStatistic Low
Num Faults j2cModule.faults Number of faults, such as timeouts, in connection pool Per connection factory CountStatistic Low
Free Pool Size j2cModule.freePoolSize Number of free connections in the pool Per connection factory BoundedRangeStatistic High
Pool Size j2cModule.poolSize Average number of managed connections in the pool. Per connection factory BoundedRangeStatistic High
Concurrent Waiters j2cModule.concurrentWaiters Average number of threads concurrently waiting for a connection Per connection factory RangeStatistic High
Percent Used j2cModule.percentUsed Average percent of the pool that is in use Per connection factory RangeStatistic High
Percent Maxed j2cModule.percentMaxed Average percent of the time that all connections are in use Per connection factory RangeStatistic High
Avg Wait Time j2cModule.avgWait Average waiting time in milliseconds until a connection is granted Per connection factory TimeStatistic Medium
Avg Use Time j2cModule.useTime Average time in milliseconds that connections are in use Per connection factory TimeStatistic Medium

Name	Key	Description	Granularity	Type	Level
Num managed connections	j2cModule.numManagedConnections	Number of ManagedConnection objects in use	Per connection factory	CountStatistic	Low
Num connection handles	j2cModule.numConnectionHandles	Number of connections that are associated with ManagedConnections (physical connections) in this pool	Per connection factory	CountStatistic	Low
Num Connections Created	j2cModule.numManagedConnectionsCreated	Total number of managed connections created	Per connection factory	CountStatistic	Low
Num Connections Destroyed	j2cModule.numManagedConnectionsDestroyed	Total number of managed connections destroyed	Per connection factory	CountStatistic	Low
Num Connections Allocated	j2cModule.numManagedConnectionsAllocated	Total number of times a managed connection is allocated to a client (the total is maintained across the pool, not per connection).	Per connection factory	CountStatistic	Low
Num Connections Freed	j2cModule.numManagedConnectionsReleased	Total number of times a managed connection is released back to the pool (the total is maintained across the pool, not per connection).	Per connection factory	CountStatistic	Low
Num Faults	j2cModule.faults	Number of faults, such as timeouts, in connection pool	Per connection factory	CountStatistic	Low
Free Pool Size	j2cModule.freePoolSize	Number of free connections in the pool	Per connection factory	BoundedRangeStatistic	High
Pool Size	j2cModule.poolSize	Average number of managed connections in the pool.	Per connection factory	BoundedRangeStatistic	High
Concurrent Waiters	j2cModule.concurrentWaiters	Average number of threads concurrently waiting for a connection	Per connection factory	RangeStatistic	High
Percent Used	j2cModule.percentUsed	Average percent of the pool that is in use	Per connection factory	RangeStatistic	High
Percent Maxed	j2cModule.percentMaxed	Average percent of the time that all connections are in use	Per connection factory	RangeStatistic	High
Avg Wait Time	j2cModule.avgWait	Average waiting time in milliseconds until a connection is granted	Per connection factory	TimeStatistic	Medium
Avg Use Time	j2cModule.useTime	Average time in milliseconds that connections are in use	Per connection factory	TimeStatistic	Medium