WQS_PERSIST_SHMEM
WIS and WQS Process Configuration
Summary
This attribute defines how often (in seconds) the contents of the WQS/WIS shared memory are written to the wqs_index table in the database.
Applies To
This attribute can be set for the WQS process (only). 
Permissible Values
The attribute value must be an integer in the range 1 to 3600.
Default Value
The attribute is assigned the following default value when iProcess Engine is installed.
| Machine ID | Process | Instance | Value | 
| 0 | WQS | 0 | 300 | 
Notes
When the WIS process starts up, it uses the total_items column in the wqs_index table to determine the number of work items in each work queue. It compares this value to the WIS_CACHE_THRESHOLD value to determine whether to cache the work queue.
If TIBCO iProcess Engine is started, cases are loaded into a work queue, then the system is shut down again within the WQS_PERSIST_SHMEM value, the item counts in the wqs_index table will not match the actual item counts.
See Configuring When WIS Processes Cache Their Queues for more information.