Ireland have never got past a quarter final and lost at that stage to New Zealand last weekend
The All Blacks play Argentina in the first of the semi finals in Paris tonight - kick off is at 8pm Irish time.
O'Gara believes it's time to recalibrate:

Monday Morning Sports Update
Mo Salah's Liverpool Future Could Be Decided Today
Leinster Look To Go Two From Two In The Champions Cup Tonight
Friday Morning Sports Update
Kildare's Lauren Walsh Prepare's For LPGA Tour After Winning Full Time Card
The PDC World Darts Championship Gets Underway Tonight
Reiko Ioane Starts For Leinster For The First Time Tomorrow
Rory McIlroy Among Six Nominees For The BBC's Sports Personality Of The Year