Average "RFC" Response Time is High

Hi Friend,

Investigating one issue since yesterday and thought better to the issue in the forum if I can get answer soon.

We have observed high avg RFC response time in BW system. This is specially for the time period 0-6 AM.

All other response times are normal (Dialog,Background etc).

Average Response Time for RFC - 10582 MS

Also observed that IO is bit high during this time period. Log Utilizations are bit high.

Any suggestion will help me to dig the issue further.

Thanks

Mukesh