]
Galder Zamarreño updated EJBTHREE-1703:
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Priority: Critical (was: Major)
SLSB pooling statistics misleading when using ThreadLocalPool
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Key: EJBTHREE-1703
URL:
https://jira.jboss.org/jira/browse/EJBTHREE-1703
Project: EJB 3.0
Issue Type: Bug
Components: pool
Affects Versions: AS 4.2.3.GA, 1.0.0-GA
Reporter: Galder Zamarreño
Priority: Critical
SLSB pooling statistics are hugely misleading when using default ThreadLocalPool:
"The default pooling strategy used by EJB3 SLSBs is a ThreadLocalPool whose maximum
is not really
quantifiable. The maximum is the maximum number of concurrent threads talking to that
EJB3 SLSB
that the system can allocate. So, the MaxSize that you see in that JMX view is bogus at
least for its
current definition of maximum.
MaxSize - AvailableCount will give you the number of EJB3 SLSBs currently in use, in your
case, 0. Again,
the meaning of AvailableCount for this pool strategy is not precise.
CreateCount does represent the number of EJB3 SLSBs that have been created.
CurrentSize is a bit more complicated to explain. For each thread that uses an EJB3
SLSBs, thread local
pool maintains a pool per each thread where there's an instance active in case
it's needed again. So,
CurrentSize indicates how many of these active instances there are, which assuming that
each thread
uses only one instance of the bean, matches the number of instances that have been
created."
Example:
AvailableCount int R 30 MBean Attribute.
MaxSize int R 30 MBean Attribute.
StateString java.lang.String R Started MBean Attribute.
State int R 3 MBean Attribute.
CurrentSize int R 165 MBean Attribute.
CreateCount int R 165 MBean Attribute.
RemoveCount int R 0 MBean Attribute.
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