TABLE 18–4
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 18–5
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.
About Monitoring
Chapter 18 • Monitoring Components and Services
179
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