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