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