Should NPS-backup cause metric processing freeze?

Hi

My customer has NNMi 10.10 on Linux with iSPI Performance for Metrics and a separate/dedicated NPS-server.  They run backups of the NPS every night by means of the backup.ovpl command.

Every time they run a FULL backup at 01:00 (AM), it takes approx 6, 5 hours (!) to finish. When the backup is finished, there are several hundreds (often more than 1000) unprocessed metrics-files from NNMi in the /metrics/final directory. The NPS  then starts to work through these, but it takes another few hours before all of them have been processed.

Is it normal/expected that the NPS totally stops processing such metrics-files during backup?

BR,
Frank Mortensen
Managon AB