Drastic Reduction in transaction logging

Greetings, We have Online 7.12 UC1 currently, we started up on 7.10 about 6 months ago. We are logging our transactions using ontape -c. When we first started the database in production we were writing as many as 100 logs a day. We had to regularly change the 4mm tape we were writing to twice a day to keep up with the volume. Since an engine restart about 6 weeks ago we have only been writing about 100 logs a day. The volume dropped over 90%!! The only setting we changed in the onconfig file was PDQPRIORITY. When we started up it was set at 1, we changed it to 0 because we had no fragmented tables and felt that the PDQPRIORITY might be hindering rather than helping performance. Has anyone else experienced this phenomenon? Is PDQPRIORITY responsible for this, or are there other onconfig settings we should review? TIA Dave Thacker Omni Hotels Reservation Center