What conditions cause `indefinite` persist-records to clear

Do they persist between reboots or if the destination pool member is marked unhealthy?

persistence table will be gone when rebooting (since it is in memory).

pool member availability change does not affect persistence record. traffic hitting virtual server is required to trigger change in persistence record.

will the records that appear when running tmsh show ltm persistence persist-records ever get cleared out for any reasons?

i do see sometime persistence record is deleted but sometime it is updated with a new pool member.