misha.tyulenev, would you please confirm that the following descriptions are correct or clarify where they might be misleading?

ss logicalSessionRecordCache lastSessionsCollectionJobDurationMillis:
The time it took to persist sessions from memory to config.system.sessions in the last periodic task run.

ss logicalSessionRecordCache lastSessionsCollectionJobEntriesRefreshed:
Number of sessions persisted from memory to config.system.sessions in the last periodic task run.

ss logicalSessionRecordCache lastTransactionReaperJobDurationMillis:
The time it took to purge sessions in the last run of the periodic task.