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TIBCO iProcess® Engine 11.9.1

# Configuring Queue Updates

The queue update thread performs two functions:

| • | It goes through all the queues handled by the `WIS` process and checks for expired deadlines, priority escalations, redirection work, new or purged work items and so on.

| • | It calls the `WQS` process for a new queue to handle when required (i.e. when the `WQS` process has processed a `MOVESYSINFO` event and sent out an `SE_WQSQUEUE_ADDED` event to the `WIS` process).

The queue update thread performs updates for WIS_UPDATE_LENGTH seconds or until all queues have been processed, at which point it will become idle for WIS_UPDATE_PERIOD seconds. If the thread hasn't gone through all the queues within the WIS_UPDATE_LENGTH time then it will start from the point it finished at on its previous update.

Note: The queue update thread performs its work independently of and concurrently with the RPC processing threads. In pre-10.4 versions of iProcess Engine, where the `WIS` process was single-threaded, the `WIS` process had to switch between processing RPC requests and updating work queues.

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