The following ics.conf file parameter specifies the time in seconds to wait before Calendar Server scans the Group Scheduling Engine (GSE) queue for incoming jobs:
If there are more jobs in the queue than the maximum threads allocated, the last thread always scans the queue again. Therefore, this setting only takes effect when the number of jobs is below the maximum threads allocated.
The default is "3". Increasing this number reduces the frequency the server scans the queue and can improve overall performance. However, if the queue is getting too large because of an increased volume of events, the time can be decreased to allow the queue to be processed faster. This may serve to slow down overall performance, but events will be updated sooner.