The following tables normally have the highest rate of insert, update, and delete operations:

• pr_sys_locks – Locked records
• pc_history_work – Work item history
• pc_assign_ – Assignments

The following tables normally have a low rate of insert, update, and delete operations:

• pr_other – Empty unless your system has instances of classes without an associated Data-Admin-DB-Table instance.
• pr4_rule_ – Rules
• pr4_base – Foundation rules