very slow updates in 8.3?

Hi,

I have noticed that the first time you execute an:

update table1 set params_count=0;

it takes too long to complete: 11000 rows - 100 s.

Postgresql 8.3 configuration on Turion 64 with 1.4 Gb RAM, Windows XP

Which compiler is used to build Postgresql on Windows? Is it 9?

Any comment?


Cheers,
Anton