DB2 for iSeries/AS400 supports database connectivity
through the toolbox for the Java set of JDBC drivers. The toolbox obtains
its connections from a set of pre-start jobs, called QZDASOINIT jobs, on
the database host server to hand out to WebSphere Application Server for
its pool of connections.
Closing or discarding a connection from the pool does not correlate to
closing a connection in the toolbox pool. These QZDASOINIT pre-start jobs
on the database host are not stopped until the maximum number of uses is
reached (the default is 200). Therefore, the connections tend to persist
for a very long time.
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