Parallel Sharing Rule Recalculation

Normally, when an administrator creates, deletes, or edits a sharing rule, the recalculation required to make those changes take effect is processed synchronously. The same is also true when sharing rules are recalculated because of updates, such as a movement of roles or changes to the membership of the source group for rules. The calculation proceeds as a single job and typically completes within a few minutes.

However, when a sharing rule change affects access rights to a very large amount of data, the recalculation can run longer. In addition, a recalculation job can get killed if it is running when Salesforce performs a scheduled feature or patch release.

If you have experienced long-running processing times or jobs that were killed during realignments, consider using parallel sharing rule recalculation. When this feature is turned on, sharing rules are processed asynchronously and split into multiple simultaneous execution threads based on load. The processing is also more resilient; during a server restart, the jobs will be reinstated on the queue, and the process will continue when the server comes back online.