Have you tried "asadmin set ... "?
$ asadmin get 'configs.config.cluster1-config.mdb-container.*'
configs.config.cluster1-config.mdb-container.idle-timeout-in-seconds=600
configs.config.cluster1-config.mdb-container.max-pool-size=32
configs.config.cluster1-config.mdb-container.pool-resize-quantity=8
configs.config.cluster1-config.mdb-container.steady-pool-size=0
The above get command shows the current setttings for mdb-container. You can use "asadmin set" to modify them.
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