Background job in running with delay

Hi ,

In My ECC6.0 System all jobs are running with a delay of approx 90 secs, I checked Work processes are free during all the time still all jobs are running with delay of 90 Sec.

Parameter rdisp/btctime is set to 60 Secs in our system.

Please let us know, what could be other possible reasons of this delay in jobs processing.

Regards,

Shivam Mittal