Tvheadend

Hi

I have an issue, that whenever tvheadend starts, it rescans all muxes, which means that it takes a long while before i can watch any tv.

Is this normal?

I have 3 satellites connected (diseqc) which totals approx 4000 services.

Any help would be appreciated.

TVHeadend 2.12 (Pulse Eight)
TBS6981 Dual DVB-S2 Tuner
Xubuntu 11.10

Thanks