JDBC connection pool usage can be monitored for the entire server (all connection pools) or with a named connection pool. It is measured as: percent used/maximum configured

To monitor, use the following plugin invocation: check_was -s connectionpool -w 80 -c 90 -p <server name> -n <connection pool name>

-w sets the threshold percent used for issuing warnings -c sets the threshold percent used for issuing critical issues -p sets the server name in check_was.servers to be used -n sets the name of the connection pool to be monitored. Optional, if not provided all connection pools will be checked.