The main question to ask yourself is "are you paying enough into your pension to meet your retirement goals?"
You should consider putting aside as much as you can reasonably afford without overstretching yourself: the long term rewards can be well worth it.
Remember that every day you put it off makes a difference to your income when you eventually retire. And by then it may be too late to do anything about it.
Remember that if you are unsure as to how much you should pay into your pension, you should seek financial advice. There may be a cost associated with obtaining advice.