websphere 7 JMS connection pool; grows and grows

Question

I'm running websphere 7 (fixpack 7.0.0.1.9) & websphere-mq7 (fixpack 7.0.1.5).

I've set the connection pool for both my FACTORIES (FACTORY and MQ_FACTORY) to...

FACTORY

Connection timeout : 180   seconds
Maximum connections : 10   connections
Minimum connections : 1    connections
Reap time : 180  seconds
Unused timeout 1800  seconds
Aged timeout  0  seconds
Purge policy :EntirePool

MQ_FACTORY

Connection timeout : 180   seconds
Maximum connections : 10   connections
Minimum connections : 1    connections
Reap time : 180  seconds
Unused timeout 1800  seconds
Aged timeout  0  seconds
Purge policy :EntirePool

The PMI tool shows the following...

JCA Connection Pools...
CreateCount : 27.0
CloseCount  : 4.0
PoolSize    : 23.0

JMS Connection Factories
CreateCount : 14.0
CloseCount  : 2.0
PoolSize    : 12.0

Websphere MQ JMS Provider
CreateCount : 13.0
CloseCount  : 2.0
PoolSize    : 11.0

HOW is my connection pool bigger than the pool size?!?!?! HOW come the pool size remains high???

The more messages I send in, the bigger it gets.

So for example, I've just sent in a load more messages and now my sizes are...

JCA Connection Pools...
CreateCount : 35.0
CloseCount  : 0.0
PoolSize    : 35.0
FreePoolSize: 14.0

JMS Connection Factories
CreateCount : 15.0
CloseCount  : 0.0
PoolSize    : 15.0
FreePoolSize: 0.0

Websphere MQ JMS Provider
CreateCount : 20.0
CloseCount  : 0.0
PoolSize    : 20.0
FreePoolSize: 14.0

Here are the stats for the factories...

JMS$MQ_FACTORY
    CreateCount : 6.0
    CloseCount  : 0.0
    PoolSize    : 6.0
    FreePoolSize: 5.0

JMS$FACTORY
    CreateCount : 14.0
    CloseCount  : 4.0
    PoolSize    : 10.0
    FreePoolSize: 5.0

jms/MQ_FACTORY
    CreateCount : 6.0
    CloseCount  : 0.0
    PoolSize    : 6.0
    FreePoolSize: 0.0

jms/FACTORY
    CreateCount : 9.0
    CloseCount  : 0.0
    PoolSize    : 9.0
    FreePoolSize: 0.0

Does anyone have any ideas?

Thanks Jeff Porter

shelley shelley · Accepted Answer · 2012-01-20T18:05:47

The "JCA Connection Pools" represents the totals for the "JMS Connection Factories" and "WebSphere MQ JMS Provider." (Notice that the sum of these two individual stats equals the stats in the "JCA Connection Pools.")

Also, the connection pooling settings are for each configured connection factory, and the "JMS Connection Factories" and "WebSphere MQ JMS Provider" statistics represent the sum for all submodules (i.e. for all connection factories). Given that you stated "I've set the connection pool for both my FACTORY" (emphasis mine), I'm assuming that you actually have two different connection factories, which could explain why these values are higher than each individual connection factory's max connections.

If you are using the Performance Viewer in the ISC, you should be able to expand each module to view the individual submodules. If you are checking the stats through wsadmin, you will need to grab the substats (getSubStats) for the JCA modules.

websphere 7 JMS connection pool; grows and grows

2 Answers