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TIBCO iProcess® Engine 11.9.1

# The WIS Process

Draft comments: Multi-threaded WIS introduced in 10.4 by CR16908.

The `Work Item Server (WIS)` process handles the listing of work items in user and group queues. Each `WIS` process is allocated one or more queues to handle by the `WQS` process and responds to client RPC requests to process work items held in these queues.

You can use the `swadm add_process` and `delete_process` commands to change the number of `WIS` processes on your system according to your requirements. See Using SWDIR\util\swadm to Administer Server Processes for more information about how to use these commands.

The `WIS` process is multi-threaded, allowing it to perform multiple tasks simultaneously. Different threads are used to:

| • | process RPC requests from client applications.

| • | filter work queues. For example, only show work items started by a particular user.

| • | update each queue being handled. For example, checking for expired deadlines, priority escalations, or for new queues to be handled.

| • | cache the information that the `WIS` process maintains about each work queue that it is handling, allowing the `WIS` processes to respond quickly to RPC requests from client applications.

| • | dynamically update CDQP definitions for work items.

The following diagram shows:

| • | the different threads that are used by the `WIS` process.

| • | the process attributes that you can use to control each type of thread.

| • | a reference for more information on how to configure this aspect of the `WIS` process’ behavior.

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