This attribute specifies the maximum number of Arbortext PE サブプロセス that the Queued Transaction Scheduler can use to execute queued transactions. By default, this parameter is set to -1, meaning that every Arbortext PE サブプロセス in the pool can be allocated to the Queued Transaction Scheduler. If this attribute is set to 0, then no Arbortext PE サブプロセス in the pool will ever be allocated to the Queued Transaction Scheduler. You can set maxConcurrentQueuedTransactions to 0 to dedicate the Arbortext PE サブプロセス pool to processing only immediate transactions.