Informix Module - Slow backup of Logical logs through Onbar

Hi,

I have a customer with the following configuration:
Informix 10
Networker Module for Informix 3.0
Redhat linux Enterprise

We have set up the informix to backup, using onbar, the logical logs to a Backup-to-disk folder on the same client (it is a storage node).
However, when we start the backup of the logical logs, we have noticed a delay/pause of 20seconds between each log backup.
i.e. if the system needs to backup 10 log files, it sends the first saveset and backs it up, then waits for 20seconds before sending the next log file,

It seems that this delay is caused by the time it takes for the onbar process to receive an acknowledgement from the NSR server that the saveset backup is ready.

The problem with this is that there may come a point where, if the log files fill up faster than the system can backup & therefore no free log files are available, the informix will crash.
The log file size is 2MB. This is a business requirement which cannot change.

With native ontape backup or native ISM, there is no delay between log file backups, and therefore no problem.

My question is the following:
Has anybody experienced this?
if yes, is there a workaround?
or is this a limitation of the Networker module.

Thanks
Kenneth